update drools version for java 1.7

- clean ide files

- remove mysql dependency
- don't include test domain class

upgrade to Drools 5.3.0 and jBpm 5.2.0

version v0.5.1

first version that works supporting a flush in the middle of a proces…

…s execution.

- supports flushing the session in the middle of the execution.

- changed how blobs are handled.

passed all tests

fixes for testPersistenceVariables