Merge remote-tracking branches 'origin/mr/57', 'origin/mr/58', 'origin/mr/59', 'origin/mr/60', 'origin/mr/61' and 'origin/mr/62' into release-0.1

Necessary to install pkgs related to compute node

Latest versions of packer removed ssh-rsa keys from accepted methods of
publickey auth. This commit is a workaround to allow ssh-rsa to be used
for ssh by packer communicator to ssh into build instance.
This should be fixed in the upcoming iterations to use correct methods
like ssh-ecdsa etc.

The def modules are specified in group_vars/all but here we overwrite
them by putting them in group_vars/compute. This is done in this way
because the default values we specify in group_vars/all is for COD
deploys, we don't want to break the cod deploy by changing this value so
we take advantage of variable precedence

Add local user

Closes #78

See merge request rc/packer-openstack-hpc-image!55

Update running knightly instance amount

Closes #80

See merge request rc/packer-openstack-hpc-image!54

Update packer installation method

See merge request rc/packer-openstack-hpc-image!53

Add terraform to docker image

Closes #77

See merge request rc/packer-openstack-hpc-image!52

Remove gitlab ci deprecated keywords

See merge request rc/packer-openstack-hpc-image!51