Revert "travis yml install cmake again"

This reverts commit b3c4e9f037d28d61a7c34e74135b98edca40abd8.
Revert "rename linux-conf- files"

This reverts commit 05d395ae4be9c944911bd8389ce98608d215600c.
Revert "travis yml change back to buildd with sudo"

This reverts commit 646b948f0b36bad0f0d7d1509108ef954c3c71af.