Merge pull request #512 from euanh/build-improvements

rpms/upload.sh: Remove unused script
Merge pull request #513 from euanh/build-improvements

deb: Remove unused ocp-ppa repository configuration
Merge pull request #514 from euanh/build-improvements

deb: Remove unused apt-repository config files and update script
xenserver-core-latest-snapshot: Remove unused metapackage

Signed-off-by: Euan Harris <euan.harris@citrix.com>