Per our dev meeting today, can we add tests cases and also ensure following semantics work for delete

Delete
1) pegasus-rc-client delete my_lfn # Delete everything about LFN

2) pegasus-rc-client insert my_lfn my_pfn site="my_site_3" # Delete everything about PFN. Remove LFN/Meta if nothing else associated with it

3) pegasus-rc-client insert my_lfn my_pfn site="my_site_3" key=”val” # Delete specific meta only