Fix metadata.json lint issues
Fix metadata.json lint issues

- Update license name to match a valid SPDX ID.
  https://docs.puppetlabs.com/puppet/latest/reference/modules_publishing.html
- Use interval (for semver)

Change-Id: Ie6b0589ecbbc93275902e7732b8fad162321fcdd
Signed-off-by: Gael Chamoulaud <68646863a1a9108d0246eb96cb6356f9fa9a34f3@redhat.com>

openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca