Changed mechanism to set project properties

It is now possible to set properties for a project individually:

lb-sdb-setprojectprop Gaudi TestProp TestVal

To view the properties for Gaudi:

lb-sdb-query getProperties Gaudi

And to remove the property altogether:

lb-sdb-setprojectprop -r Gaudi TestProp

Fixes: LBCORE-1096

LbRelease/python/LbRelease/SoftConfDB/LbSdbQuery.py

@@ -428,6 +428,8 @@ if __name__=='__main__':
   %prog listDatapkgs                                       : List known Data packages
   %prog listDatapkgVersions <datapkg>                      : List known versions for the specified Data package
   %prog listTag <tag>                                      : List projects/version tagged with that specific value
+  %prog getProperties <project>                            : Lists the properties of a project
+  
       """
     s = LbSdbQuery(usage=sUsage)
     sys.exit(s.run())