Replace printStackTrace with logging in the test suite

Other logging issues in the test suite:

• Some tests use System.out for output
• ClusteredSecureCacheTest.clearContent() writes a stack trace on System.err:

  java.lang.NoSuchFieldException: componentRegistry
  	at java.lang.Class.getDeclaredField(Class.java:2070)
  	at org.infinispan.test.TestingUtil.extractField(TestingUtil.java:186)
  	at org.infinispan.test.TestingUtil.extractField(TestingUtil.java:166)
  	at org.infinispan.test.TestingUtil.extractComponentRegistry(TestingUtil.java:857)
  	at org.infinispan.test.TestingUtil.extractComponent(TestingUtil.java:1022)
  	at org.infinispan.test.TestingUtil.getTransactionManager(TestingUtil.java:1035)
  	at org.infinispan.test.TestingUtil.clearRunningTx(TestingUtil.java:720)
  	at org.infinispan.test.TestingUtil.clearContent(TestingUtil.java:677)
  	at org.infinispan.test.TestingUtil.clearContent(TestingUtil.java:666)
  	at org.infinispan.test.MultipleCacheManagersTest.clearContent(MultipleCacheManagersTest.java:98)
  	at org.infinispan.security.ClusteredSecureCacheTest.access$301(ClusteredSecureCacheTest.java:22)
  	at org.infinispan.security.ClusteredSecureCacheTest$3.run(ClusteredSecureCacheTest.java:61)
  	at org.infinispan.security.ClusteredSecureCacheTest$3.run(ClusteredSecureCacheTest.java:57)
  	at org.infinispan.security.Security.doAs(Security.java:143)
  	at org.infinispan.security.ClusteredSecureCacheTest.clearContent(ClusteredSecureCacheTest.java:57)