Merge globus 4 & 5 implementations of authz module

[dvstans]

95% of the code is the same between the globus 4 and 5 implementations of the authz module. These should be merged into one and coded to auto-detect which version of globus is installed. This can be done by testing for the client id environment var that is present only in globus 5. Note this applies to the devel branch only.