Inject dev ssh keys when a variable is set

Currently, developers that want to connect to the CI VM to verify
what is happening with the environment need to make many "hoops"
to connect to that host.
That feature will be helpful for developers of sf-operator project to
inject pub keys just by setting:

    inject_dev_ssh_keys: true

in the zuul.d job definition.

Change-Id: I234cb597d61c87abe884ecc7826419f954ed1158

playbooks/health-check/dev-keys.yaml

@@ -0,0 +1,14 @@
+---
+- hosts: all
+  tasks:
+    - name: Set dev ssh keys
+      when: inject_dev_ssh_keys | default(false)
+      block:
+        - name: Clone SF devs pub keys repo
+          ansible.builtin.git:
+            repo: https://softwarefactory-project.io/r/SF_devs_public_keys
+            dest: SF_devs_public_keys
+
+        - name: Copy content to authorized keys
+          ansible.builtin.shell: |
+            cat SF_devs_public_keys/authorized_keys >> ~/.ssh/authorized_keys

zuul.d/jobs.yaml

@@ -9,6 +9,7 @@
     parent: sf-operator-microshift
     timeout: 3600
     pre-run:
+      - playbooks/health-check/dev-keys.yaml
       - playbooks/health-check/dstat-pre.yaml
     post-run:
       - playbooks/health-check/dstat-post.yaml
@@ -41,6 +42,7 @@
       cloudprovider_dns:
         - 199.204.44.24
         - 199.204.47.54
+      inject_dev_ssh_keys: false
 
 - job:
     name: sf-operator-multinode