ISPN-4412 Fix failing embedded security integration tests

https://issues.jboss.org/browse/ISPN-4412

Upgrading the test configuration to align with WildFly 8.1 fixes the tests for me

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 T E S T S
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Running org.infinispan.test.integration.security.embedded.LdapAuthenticationIT
Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 20.847 sec - in org.infinispan.test.integration.security.embedded.LdapAuthenticationIT
Running org.infinispan.test.integration.security.embedded.KrbLdapAuthenticationIT
Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.784 sec - in org.infinispan.test.integration.security.embedded.KrbLdapAuthenticationIT

Results :

Tests run: 28, Failures: 0, Errors: 0, Skipped: 0