Bring centos 7 tests back
See merge request !6292 (merged)
(cherry picked from commit 2d4cd41e)
cc89b432 Bring centos back 8b4b0f80 Add sclo repo for llvm-toolset-7-clang problem 1cdf71ac Add gpg keys
Bring centos 7 tests back
See merge request !6292 (merged)
(cherry picked from commit 2d4cd41e)
cc89b432 Bring centos back 8b4b0f80 Add sclo repo for llvm-toolset-7-clang problem 1cdf71ac Add gpg keys