Align naming for the Fedora CoreOS Pipeline

Our playbook was named `fedora-coreos.yml` and our role was
named `fcos-pipeline`. Let's meet in the middle at `fedora-coreos-pipeline`
for both.

Also update some of the descriptions.

playbooks/openshift-apps/fedora-coreos-pipeline.yml

@@ -4,9 +4,9 @@
   gather_facts: false
 
   roles:
-  - role: openshift-apps/fcos-pipeline
-    project_name: fedora-coreos
-    project_description: Jenkins pipeline configuration for Fedora CoreOS.
+  - role: openshift-apps/fedora-coreos-pipeline
+    project_name: fedora-coreos-pipeline
+    project_description: Fedora CoreOS Pipeline
     appowners:
     - dustymabe
     - jlebon

roles/openshift-apps/fedora-coreos-pipeline/defaults/main.yaml

@@ -1,5 +1,5 @@
-project_name: fedora-coreos
-project_description: Jenkins Pipeline Configuration for FHCOS
+project_name: fedora-coreos-pipeline
+project_description: Fedora CoreOS Pipeline
 project_service_account: fcos-sa
 appowners: []
 ocp_service_account: root