Allow JMESPath on searching networking resources
Allow JMESPath on searching networking resources

As most of search methods in SDK, allowing a JMESPath expression for
network, subnet, port and router resources is powerful to end users.

Story: #2003611
Task: #24945

Change-Id: I85a51e16c4f714c15b1920c0085d98a095832904

dtroyer/python-openstacksdk,stackforge/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk