rdma-core-15.6:

Updates from version 15.5

• Backport fixes:
  • travis: Fix travis failures
  • verbs: If the uverbs module is not loaded allow get_devices to retry init
  • mlx5: Fix flow tag mask
  • rxe: fix rxe compilation with newer kernels
  • Revert "buildlib: pick leap over tumbleweed"
  • buildlib: pick leap over tumbleweed
  • mlx5: Fix compilation on 32 bit systems when sse3 is on
  • mlx5: Allocate huge page chunks only when needed
  • rxe: Do not use _sockaddr in struct rxe_av
  • rxe: Remove duplicate include