Parse Ironic packages files/{apts, rpms}/ironic

When VIRT_DRIVER=ironic, make sure devstack picks up packages listed in its
respective packages file.  These were previously missed unless "ironic" was
explictly added to the enabled services.  This ensures required packages
are installed for any of the ir-* services.

Change-Id: I3d70009819a3a6933220cabd5a951a20c7b48849
fix typo in running opendaylight command

when running opendaylight, set the java home directory to environment
variable.
but variable name is wrong.

Change-Id: I050758d3b4e3f0eec6c86b9a675dfd07854c04fa
Merge "Parse Ironic packages files/{apts, rpms}/ironic"
Merge "fix typo in running opendaylight command"