Fix UT failure in TestHtmlSanitizerServiceImplwith MariaDB

java.lang.AssertionError: invoke on features error [Holder [type=class org.nuxeo.runtime.test.runner.MDCFeature], Holder [type=class org.nuxeo.runtime.test.runner.ConditionalIgnoreRule$Feature], Holder [type=class org.nuxeo.runtime.test.runner.RandomBug$Feature], Holder [type=class org.nuxeo.runtime.test.runner.RuntimeFeature], Holder [type=class org.nuxeo.runtime.test.runner.ContainerFeature], Holder [type=class org.nuxeo.ecm.core.test.TransactionalFeature], Holder [type=class org.nuxeo.ecm.core.test.CoreFeature]]
	at org.nuxeo.runtime.test.runner.FeaturesLoader.apply(FeaturesLoader.java:123)
	at org.nuxeo.runtime.test.runner.FeaturesLoader.apply(FeaturesLoader.java:113)
	at org.nuxeo.runtime.test.runner.FeaturesRunner.start(FeaturesRunner.java:193)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$BeforeClassStatement.evaluate(FeaturesRunner.java:264)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runners.Suite.runChild(Suite.java:127)
	at org.junit.runners.Suite.runChild(Suite.java:26)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:113)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:85)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:54)
	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:134)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
	Suppressed: org.nuxeo.ecm.core.api.NuxeoException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 5,284 milliseconds ago.  The last packet sent successfully to the server was 8 milliseconds ago.
		at org.nuxeo.ecm.core.test.StorageConfiguration.initJDBC(StorageConfiguration.java:156)
		at org.nuxeo.ecm.core.test.StorageConfiguration.init(StorageConfiguration.java:124)
		at org.nuxeo.ecm.core.test.CoreFeature.start(CoreFeature.java:178)
		at org.nuxeo.runtime.test.runner.FeaturesRunner$6.call(FeaturesRunner.java:197)
		at org.nuxeo.runtime.test.runner.FeaturesLoader.apply(FeaturesLoader.java:126)
		... 22 more
	Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 5,284 milliseconds ago.  The last packet sent successfully to the server was 8 milliseconds ago.
		at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
		at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
		at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
		at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
		at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
		at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:988)
		at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3552)
		at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3452)
		at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3893)
		at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:875)
		at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1712)
		at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1228)
		at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2253)
		at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2284)
		at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083)
		at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806)
		at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
		at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
		at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
		at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
		at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
		at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
		at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410)
		at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328)
		at java.sql.DriverManager.getConnection(DriverManager.java:664)
		at java.sql.DriverManager.getConnection(DriverManager.java:247)
		at org.nuxeo.ecm.core.storage.sql.DatabaseMySQL.setUp(DatabaseMySQL.java:61)
		at org.nuxeo.ecm.core.test.StorageConfiguration.initJDBC(StorageConfiguration.java:154)
		... 26 more
	Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
		at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3004)
		at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3462)
		... 47 more