Merge changes from cloudhub-mojos-refactoring branch

#Extracted superclass from CoudHubDeployMojo delegating getArtifactFile to subclasses. Created ArtifactCloudHubDeployMojo and TargetCloudHubDeployMojo classes 

#Adding mappings folder in oder to include grf when packaging:

When the packaging is being done now mappings directory will be included with the grf files used by DataMapper. Previously this was not being done and no DataMapper User Apps could be deployed.