ADDED: pause/resume to XES scan contoller
Base pauseImplementation() and resumeImplementation() and canPause() to
return true.
Still need to to impliment new MCP PV to block incomming counts while
paused.
ADDED:
```basic pauseImplimentation to REIXSXESScanActionController()```
ADDED:
```scanControllerStateMachineFinished_ = true``` to
```REIXSXESScanActionController::stopImplementation()``` so that the
```REIXSXESScanAction``` doesn't get suck with ```readyForFinished()```
permanently ```false```
CLEAN UP:
remove commented out code
Merge pull request #1077 from acquaman/Issue1046

Pull request for Issue1046 - REIXS XES scans won't skip