Update rhos-release path for SQL Alchemy plugin

Change-Id: I0dc02a8a454d5c1ef806c16770b87103dd9c776f

ansible/install/group_vars/all.yml

@@ -560,3 +560,6 @@ nginx_kibana_port: 80
 # default is no (set to blank) or false
 # set the below variable to 'true' to activate
 install_curator_tool: false
+
+# pass rhos_release url
+rhos_release:

ansible/install/roles/collectd/tasks/main.yml

@@ -3,6 +3,10 @@
   include_vars:
     file: "vars/{{ rhosp_major }}.yml"
 
+- name: Fetch vars
+  include_vars:
+    file: vars/defaults.yml
+
 - name: (Undercloud) Get ctlplane ip address
   shell: ip r | egrep 'br-ctlplane\s*proto kernel' | awk '{print $NF}'
   register: undercloud_ctlplane_ip_address
@@ -64,8 +68,6 @@
 - name: install sqlalchemy collectd package inside the containers
   block:
     - name: packages needed for installing sqlalchemy collectd
-      vars:
-        rhos_release: http://download-node-02.eng.bos.redhat.com/rcm-guest/puddles/OpenStack/rhos-release/rhos-release-latest.noarch.rpm
       set_fact:
         packages_sqlalchemy_collectd: dnf install -y {{ rhos_release }} && rhos-release {{ rhosp_major }} &&  dnf install -y python3-sqlalchemy-collectd