ci: run integration tests on k8s 1.19
ci: run integration tests on k8s 1.19

With the pending release of k8s 1.19 we need to start running
the integration tests on 1.19. In master we remove support for
1.14 to keep the last five releases running in master.

Signed-off-by: Travis Nielsen <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>

rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/nfs