Extended Spring Tests, Added CDI-Support

[aschoerk]

I am thinking about including a JTA-Transactionmanager in the project ejb-cdi-unit, that is a framework to create a ejb-test-environment solely based on Weld-SE.

• To understand how this works in spring, an extension of the spring-module-tests has been done using H2.
• To support Weld-SE, an integration of bitronix-tm into CDI, similar to the integration into spring was created as extra module.
• Nothing has been changed at the implementation of the bitronix TM.
• Deactivated travis-tests in jdk7 and jdk6.