Update Oracle Java 8 to version 8u191 on maintenance jobs

[INFO] Surefire report directory: /opt/jenkins/workspace/9.10/addons_nuxeo-platform-importer-9.10/nuxeo-importer-core/target/surefire-reports
[INFO] Using configured provider org.apache.maven.surefire.junitcore.JUnitCoreProvider
[INFO] parallel='none', perCoreThreadCount=true, threadCount=0, useUnlimitedThreads=false, threadCountSuites=0, threadCountClasses=0, threadCountMethods=0, parallelOptimized=true
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Error: Could not find or load main class org.apache.maven.surefire.booter.ForkedBooter

Results :
Tests run: 0, Failures: 0, Errors: 0, Skipped: 0

[JENKINS] Recording test results
Notifying upstream projects of job completion
Join notifier requires a CauseAction
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Nuxeo Importer parent .............................. SUCCESS [  5.647 s]
[INFO] Nuxeo Importer Core ................................ FAILURE [02:57 min]
(...)
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test (default-test) on project nuxeo-importer-core: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test failed: The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
[ERROR] Command was /bin/sh -c cd /opt/jenkins/workspace/9.10/addons_nuxeo-platform-importer-9.10/nuxeo-importer-core && /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -Xmx1g -Dfile.encoding=UTF-8 -XX:-OmitStackTraceInFastThrow -jar /opt/jenkins/workspace/9.10/addons_nuxeo-platform-importer-9.10/nuxeo-importer-core/target/surefire/surefirebooter3552900878769136001.jar /opt/jenkins/workspace/9.10/addons_nuxeo-platform-importer-9.10/nuxeo-importer-core/target/surefire/surefire5280020219669256445tmp /opt/jenkins/workspace/9.10/addons_nuxeo-platform-importer-9.10/nuxeo-importer-core/target/surefire/surefire_01263151155767526965tmp

<string>java-8-openjdk</string> => <string>java-8-oracle</string>
<jdk>java-8-openjdk</jdk> => <jdk>java-8-oracle</jdk>