added IHiveStore iface


git-svn-id: svn+ssh://svn.cern.ch/reps/atlasoff/Control/AthenaKernel/trunk@547067 4525493e-7705-40b1-a816-d608a930855b
added IProxyDictWithPool interface, renamed IHiveStore to IHiveStoreMgr


git-svn-id: svn+ssh://svn.cern.ch/reps/atlasoff/Control/AthenaKernel/trunk@547194 4525493e-7705-40b1-a816-d608a930855b