Fix mtce.pp to handle missing /etc/rmonfiles.d directory
https://review.openstack.org/#/c/628687/ stopped packaging the
query_ntp_servers.sh script. However, since there were no other
files being packaged into that directory the spec file choose
not to create an empty directory.
When config controller called the mtce.pp manifest to install
dynamic files into /etc/rmonfiles.d it could not. So it failed.
This update adds a directory check block to the mtce.pp file
to create the directoy if its not present.
Testing: Install AIO SX in SM1
Signed-off-by: Eric MacDonald <email@example.com>