AbstractJCRTest fails on level 1 repositories

If a test case indicates that it's not read-only, org.apache.jackrabbit.test.AbstractJCRTest tries to cleanup the test root in the setUp method. This will cause the test case to fail, because a Level 1 repository will throw an UnsupportedOperationException here.

Proposal: before trying the cleanup, check for L2 functionality and throw a NotExecutableException otherwise:

if (! isSupported(Repository.LEVEL_2_SUPPORTED))

{ cleanUp(); String msg = "Test case requires level 2 functionality"; throw new NotExecutableException(msg); }