added epel/umd repositories

[ghost]

Added repositories class to add EPEL and UMD repositories.

In the instruction:

Argus Service Deployment for 1.7 version — Argus Documentation 1.7.0 documentation

it says:

EL7/x86_64 with the EPEL, CERN WLCG and UMD4 repositories enabled.

But WLCG repository seems not used, therefore it is not included.
(I may miss something, or it is needed for other services?)

[kreczko]

This is way is definitely better than creating the .repo files.
In the past we always wanted to give the freedom to disable/enable extra repos without the puppet module breaking the desired setting.

@cajbrew @rwf14f What do you think?

[rwf14f]

I agree with Luke, we need a way to enable/disable extra repositories to allow users to deploy repositories by other means, eg this change would break our setup because we have a separate module that deals with configuring the required repositories.

[rwf14f]

Doesn't the rpm provider require a source ?

[afortiorama]

Module was originally mine. I agree that the repository setup has to be flexible if added. Fixed choice of repositories setup always creates problems.