Upgrade version and add python-quantum-plugin-midonet package

Add python-quantum-plugin-midonet package in control file.
Update the version number for release.

Signed-off-by: Ryu Ishimoto <ryu@midokura.com>
Add RHEL packaging files

Add package.sh and spec file for RHEL packaging.

Signed-off-by: Ryu Ishimoto <ryu@midokura.com>