[EL8] Add nodejs:14 module stream

nodejs is a dependency of novnc in EL8, so it gets installed in the
nova-novncproxy image. Not specifying a module stream means that the
install can default to an unsupported version of nodejs.

Explicitly enabling nodejs:14 prevents that.

The EL9 build of novnc does not require nodejs so this is not a concern
there.

Change-Id: I973dc924cfc5ba31aeb0ec19805c0f987a0221a0

container-images/tcib/base/base.yaml

@@ -86,6 +86,7 @@ tcib_packages:
       - enable: mariadb:{{ tcib_rhel_modules['mariadb'] | default('10.3') }}
       - enable: virt:{{ tcib_rhel_modules['virt'] | default('av') }}
       - enable: redis:{{ tcib_rhel_modules['redis'] | default('5') }}
+      - enable: nodejs:{{ tcib_rhel_modules['nodejs'] | default('14') }}
     el9:
       - disable: virt:rhel
       - enable: virt:{{ tcib_rhel_modules['virt'] | default('av') }}