issue #603: fix monit config madness

For most services, configure procmon `process_name' attribute to use
new node['nova']['platform']['nova_*_procmatch'] regular expression.

For nova-api-os-compute, nova-api-ec2, and nova-api-metadata on redhat,
don't monitor the same "nova-api" match string multiple times.
Merge pull request #21 from invsblduck/issue603_monit_master

Merged automatically by jenkins after successful build test