976561 - removed superfluous re-fetching of collection we already have a handle to
976561 - updated the list of decorated collection methods to match the Collection object in 2.1.1
fixed names of some of the new decorated methods
chnaged retry decorator to not look up or rely on the presence of "self"
moved decorator from high-level Collection methods to lower-level Connection methods that actually call start_request and are responsible for actually messages to the database over the "network"
added docstring for retry decortator parameters
Merge pull request #564 from pulp/jconnor-976561

Jconnor 976561