Remove JSON from class name
Remove JSON from class name

NetworksTestJSON class has already been renamed to NetworksTest
in patch Ie4ffd458456d03b0b817b01bbed391f359240db2. To be
consistent, remove JSON from other test classes that inheritate
from it.

Change-Id: I5504aea2263842a639df51839cc590e467fc10e8

openstack/tempest,Juniper/tempest,masayukig/tempest,cisco-openstack/tempest,openstack/tempest,sebrandon1/tempest,Tesora/tesora-tempest,bigswitch/tempest,vedujoshi/tempest,cisco-openstack/tempest,Juniper/tempest,vedujoshi/tempest,Tesora/tesora-tempest,bigswitch/tempest,sebrandon1/tempest,masayukig/tempest