Fixed optional parameters
New Test CreateStackServiceActionTest.java and changes on CloudProcessResource.java exec
Restored the stackExpose method and the addRelation method
Added delete method on AssimilateAction
Removed test
Merge pull request #17 from n3phele/deleteAssimilate

Delete assimilate
Merge pull request #15 from n3phele/optional_parameters

Fixed optional parameters
Added, in the exec method of CloudProcessResource.java,a line to check if the StackServiceAction is not canceled and can receive a new Stack.
Merge pull request #16 from n3phele/exec_refactor

New Test CreateStackServiceActionTest.java and changes on CloudProcessRe...
Merge branch 'master' of https://github.com/n3phele/core into commands_association

Conflicts:
	n3phele/test/n3phele/AllUnitTests.java