Fix novnc console include positioning

Currently the nova console (spice/novnc) includes happen before the
venv validation/download in nova_install. While this works for spice
(the default) because it doesn't use the nova venv, novnc does, which
breaks nova console install when novnc is enabled. This patch moves
the include for novnc (and spice) to after the venv checksum/download.

Change-Id: I8c6fb525727c177ef69d8ac5fa915840643a12a8

tasks/nova_install.yml

@@ -17,20 +17,6 @@
   when:
     - ansible_pkg_mgr == 'apt'
 
-- include: nova_console_spice_install.yml
-  when:
-    - inventory_hostname in groups['nova_console']
-    - nova_console_type == "spice"
-  tags:
-    - nova-spice-console
-
-- include: nova_console_novnc_install.yml
-  when:
-    - inventory_hostname in groups['nova_console']
-    - nova_console_type == "novnc"
-  tags:
-    - nova-novnc-console
-
 - name: Create developer mode constraint file
   copy:
     dest: "/opt/developer-pip-constraints.txt"
@@ -196,3 +182,17 @@
   tags:
     - nova-install
     - nova-pip-packages
+
+- include: nova_console_spice_install.yml
+  when:
+    - inventory_hostname in groups['nova_console']
+    - nova_console_type == "spice"
+  tags:
+    - nova-spice-console
+
+- include: nova_console_novnc_install.yml
+  when:
+    - inventory_hostname in groups['nova_console']
+    - nova_console_type == "novnc"
+  tags:
+    - nova-novnc-console