Extended plugin to support specifying additional mongodb startup options
on global and job level. 
Added a field for specifying custom start timeout on global and job
level.
Fix doCheckName - accidently the implementation was replaced with wrong
one
Fix java.io.NotSerializableException caused by using anonymous inner
class in FileCallable operation. This problem is prevening the user from
setting custom dbpath.
Merge pull request #2 from borgeorgiev/master

Added support for passing additional startup options and start timeout