* Updated plug-in version to 2.0
* Renamed the MJavaExpression to MImperativeExpression
* Added test case for the MImperativeExpression
* Added new invoke method to InjectorImpl
* Added tracking attribute

Change-Id: I8027468e5b0d773c4bae43f4200d3e0e9d39a1fe
Signed-off-by: Simon <simon.scholz@vogella.com>