Rename cli tests from compute to nova

All other CLI tests use the codenames (neutron, keystone, etc).  In
order to make things uniform do the same for nova (compute).

Change-Id: I2f299e1078924643e6e556275892775228176e11
diff --git a/tempest/cli/simple_read_only/test_compute.py b/tempest/cli/simple_read_only/test_nova.py
similarity index 100%
rename from tempest/cli/simple_read_only/test_compute.py
rename to tempest/cli/simple_read_only/test_nova.py
diff --git a/tempest/cli/simple_read_only/test_compute_manage.py b/tempest/cli/simple_read_only/test_nova_manage.py
similarity index 100%
rename from tempest/cli/simple_read_only/test_compute_manage.py
rename to tempest/cli/simple_read_only/test_nova_manage.py