set suite name for DynamicSuiteItem

[deepio-oc]

In the scenario, Pabot is used with DataDriver and there are static + dynamic tests, test cases are getting repeated when pabot goes to launch dynamic test.

Without the suite name filter, when pabot launches dynamic tests, robot again starts executing static tests. By setting suite in DynamicSuiteItem, launched robot command has suite flag which limits test cases to only dynamic tests.

fixes #334