Add aliases for mpcdf_set_as_branch, mpcdf_sync_projects

Enables zsh completion to find these commands. otherwise the output of
osc help is not correctly parsed.

mpcdf_set_as_branch.py

@@ -10,6 +10,7 @@ import osc.core
 import osc.cmdln
 
 
+@osc.cmdln.alias("mpcdf_setbr")
 def do_mpcdf_set_as_branch(self, subcmd, opts, *args):
     """${cmd_name}: Convert a package to be a branch of another
 

mpcdf_sync_projects.py

@@ -15,6 +15,7 @@ import osc.cmdln
                   help="Source project")
 @osc.cmdln.option('-t', '--to',
                   help="Just sync with this single destination project")
+@osc.cmdln.alias("mpcdf_syncpro")
 def do_mpcdf_sync_projects(self, subcmd, opts, *args):
     """${cmd_name}: Branch all/missing packages from a project to another and sync their metadata