Unhardcoded inject_* params in nova-compute.conf

inject_partition affect inject_password. inject_password has effect when inject_partition in not equal '-2'.

example for pillar define:
IN
classes:
- cluster.virtual-mcp-pike-ovs.openstack.compute
parameters:
  nova:
    compute:
      inject_partition: '-1'
      inject_password: True

Related-Prod: PROD-19156

Change-Id: I0eca9418adc28b6a0c42dd77e6ec1fa2bc86a187
5 files changed