update underlying OBS paths to be more generic

[koomie]

Per recent discussion in TSC meetings, it has been recommended to adopt a more generic repo path for publishing OpenHPC RPMs. In particular, the desire is to provide a path similar to EPEL which targets major versions of the distro. In our case today, this means CentOS7 and SLES12.

The intent is to make this change for the v1.3 release and users will be provided new ohpc-release RPMs that reflect the updated convention. Here is an example of the updated. repo file that will be used for 1.3

[OpenHPC]name=OpenHPC-1.3 - Base
baseurl=http://build.openhpc.community/OpenHPC:/1.3/CentOS_7
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-OpenHPC-1

[OpenHPC-updates]name=OpenHPC-1.3 - Updates
baseurl=http://build.openhpc.community/OpenHPC:/1.3/updates/CentOS_7
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-OpenHPC-1

Similarly, the previous path for SLES will be amended from SLE_12_SP1 -> SLE_12

Note that in addition to modifications on the build server and the ohpc-release RPMs, there is some companion changes required in the documentation.

[koomie]

Updated path convention is live.