Migrate performance tests to the performance repo

We still have lots of performance related unit tests that need migrating:

rts/at/tx/src/test/java/org/jboss/jbossts/star/test/PerformanceTest.java
ArjunaJTA/jta/tests/classes/com/arjuna/ats/jta/xa/performance/OnePhasePerformanceDefaultUnitTest.java
ArjunaJTA/jta/tests/classes/com/arjuna/ats/jta/xa/performance/OnePhasePerformanceVolatileUnitTest.java
ArjunaJTA/jta/tests/classes/com/arjuna/ats/jta/xa/performance/OnePhase2PCPerformanceVolatileUnitTest.java
ArjunaJTA/jta/tests/classes/com/arjuna/ats/jta/xa/performance/OnePhase2PCPerformanceDefaultUnitTest.java
ArjunaJTA/jta/tests/classes/com/hp/mwtests/ts/jta/commitmarkable/PerformanceTestCommitMarkableResource.java
ArjunaCore/arjuna/tests/classes/com/hp/mwtests/ts/arjuna/performance/Performance1.java
ArjunaCore/arjuna/tests/classes/com/hp/mwtests/ts/arjuna/performance/Performance2.java
ArjunaCore/arjuna/tests/classes/com/hp/mwtests/ts/arjuna/performance/Performance4.java
ArjunaCore/arjuna/tests/classes/com/hp/mwtests/ts/arjuna/performance/Performance3.java
ArjunaJTS/jts/tests/classes/com/hp/mwtests/ts/jts/remote/hammer/PerfHammer.java
ArjunaJTS/jts/tests/classes/com/hp/mwtests/ts/jts/remote/hammer/GridWorker.java
ArjunaJTS/jts/tests/classes/com/hp/mwtests/ts/jts/local/synchronizations/Performance.java