Add new batch integration UI tests for validating the source in job.xml file

Implement integration ui tests for validation feature of batch job.xml file. Manipulate with xml file via source tab and check its functionality resulting in Problems View.
1. Ref element contains valid name of specific artifact
2. Properties link to valid java field of #jobProperties["xyz"]
3. Id is unique
4. Attributes next and to refer to id of step | split | flow | decision at the same level as the current execution element
5. Attributes 'flow/stop/@restart', 'step/stop/@restart' should refer to id of step | split | flow | decision at the job level
6. Sequence of execution elements defined by @next and @to should not loop.
7. Value of attribute 'include/@class' and 'exclude/@class' is qualified name of an exception class.