Terminate `tail` and add `-t` option to slave script

* Terminate log `tail` when the process is finished.
* Add `tail` option also to slave script so log from slaves can
  be gathered easily.
Set source level to Java 7 (Java 7 runtime was already used for some time)
Radargun can be run from different directory than the main one (fixed the issues).
Creating directory specific/ even if JPA is not enabled
Fixed ArgsHolder-related problems
Changed the Transactional Trait:
* new interface should fit better for Coherence or Hazelcast
* better suited for transactions spanning multiple resources (caches)
Coherence transactions implementation
* tiny problem: it does not work
Implemented querying in Hazelcast 3
Added Queryable.reindex
Hazelcast: configs for queries - in-memory format
Enabling POF (by default) for Coherence
* POF should provide better performance than Java serialization
* Utils: conf/ directories should be on classpath sooner than library jars
Iterable trait and stage testing performance of the iteration.
Disabled txs for Coherence
Removed remoting-jmx as this was causing marshalling conflicts with Infinispan
coherence fixup
tx trait fixup
hazelcast fixup
Added queryable ManyIntegersObject (+generator)
Number converter: negative numbers pattern
IterationsStats need to be static.