Add a helper method to the RPCClient class. This is a little nicer to
use for checking to see if a given message is copmatible with the set
version cap.
This can be used in a bunch of different ways:
client = RPCClient(version_cap='1.6', version='1.0')
client.can_send_version()
client.can_send_version(version='1.6')
client = client.prepare(version_cap='1.8', version='1.5')
client.can_send_version()
client.can_send_version(version='1.2')
Co-authored-by: Russell Bryant <rbryant@redhat.com>
293a34c156