o.c.utility.recordProperty: refactored rdb data provider
Merge branch 'rel15x_beta' of github.com:Desy-extern/cs-studio into rel15x_beta
o.c.utility.recordProperty: - moved vdct into separate plugin
new service implementations to retrieve record property values
o.c.utility.recordProperty: mock implementaion for rdb services
o.c.utility.recordProperty: implementaion for mks2 rdb service
o.c.utility.recordProperty: Bugfix