Fix random in org.nuxeo.adobe.cc.TestPageProviders.testSearch on MongoDB

un unit tests / Run mongodb unit tests / org.nuxeo.adobe.cc.TestPageProviders.testSearch
Failing for the past 1 build (Since #405 )
Took 0.75 sec.
Error Message

Expected size:<1> but was:<0> in:
<[]>

Stacktrace

java.lang.AssertionError: 

Expected size:<1> but was:<0> in:
<[]>
	at org.nuxeo.adobe.cc.TestPageProviders.lambda$testSearch$4(TestPageProviders.java:151)
	at org.nuxeo.adobe.cc.TestPageProviders.testPageProvider(TestPageProviders.java:169)
	at org.nuxeo.adobe.cc.TestPageProviders.testSearch(TestPageProviders.java:150)