tools: Remove EngineConfigCLIParser instance variable from EngineConfig

Removes EngineConfigCLIParser instance variable from EngineConfig since
it's needed only in EngineConfig.setUpAndExecute() method.

Change-Id: I1390755096670c7ed21882a487280d85426e576f
Bug-Url: https://bugzilla.redhat.com/1063901
Signed-off-by: Martin Perina <mperina@redhat.com>