[misc] Move LDAP test to platform

xwiki-platform-core/xwiki-platform-ldap/pom.xml

...core/xwiki-platform-ldap/xwiki-platform-ldap-test/pom.xml

...platform-ldap-test/xwiki-platform-ldap-test-tests/pom.xml

...-ldap-test-tests/src/test/it/org/xwiki/ldap/AllTests.java

.../test/it/org/xwiki/ldap/XWikiLDAPAuthServiceImplTest.java

...s/src/test/it/org/xwiki/ldap/XWikiLDAPConnectionTest.java

...-tests/src/test/it/org/xwiki/ldap/XWikiLDAPUtilsTest.java

...est/it/org/xwiki/ldap/framework/AbstractLDAPTestCase.java

...ests/src/test/it/org/xwiki/ldap/framework/LDAPRunner.java

...s/src/test/it/org/xwiki/ldap/framework/LDAPTestSetup.java

...est-tests/src/test/it/org/xwiki/ldap/ui/LDAPAuthTest.java

...iki-platform-ldap-test-tests/src/test/resources/init.ldif

...i-platform-ldap-test-tests/src/test/resources/logback.xml

.../src/test/java/com/xpn/xwiki/test/MockitoOldcoreRule.java

...test/java/com/xpn/xwiki/test/mockito/OldcoreMatchers.java