Define repository and packages variables in role defaults

Having these variables defined in vars makes impossible to override them
with inventory group_vars or host_vars, since role vars have precedence
over group_vars on the contrary to role defaults [1]

[1] https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_variables.html#understanding-variable-precedence

Change-Id: I2f5f0aae5ec028c36f5f93b331ba8c46028a388b

defaults/main.yml

@@ -33,3 +33,7 @@ frr_bgpd_config: []
 frr_bgpd_enable: "{{ (frr_bgpd_config | length > 0) }}"
 frr_daemons:
   bgpd: "{{ frr_bgpd_enable }}"
+
+frr_repos_keys: "{{ _frr_repos_keys | default([]) }}"
+frr_repos: "{{ _frr_repos | default([]) }}"
+frr_distro_packages: "{{ _frr_distro_packages | default([]) }}"

vars/debian.yml

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-frr_repos_keys:
+_frr_repos_keys:
   - id: 4A56C7738BB3F81595A805D2A832769908F13ED1
     url: "https://deb.frrouting.org/frr/keys.asc"
     state: present
@@ -24,11 +24,11 @@ frr_repos_keys:
     url: "https://deb.frrouting.org/frr/keys.asc"
     state: present
 
-frr_repos:
+_frr_repos:
   - repo: "deb {{ apt_repo_url | default('https://deb.frrouting.org/frr ' ~ ansible_facts['distribution_release'] ~ ' frr-stable') }}"
     state: present
     filename: "frr"
 
-frr_distro_packages:
+_frr_distro_packages:
   - frr
   - frr-pythontools

vars/redhat.yml

@@ -13,10 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-frr_repos_keys:
+_frr_repos_keys:
   - key: /etc/pki/rpm-gpg/RPM-GPG-KEY-FRR
 
-frr_repos:
+_frr_repos:
   - name: frr
     filename: frr-stable
     description: "FRRouting Packages for Enterprise Linux $releasever - $basearch"
@@ -28,6 +28,6 @@ frr_repos:
     baseurl: https://rpm.frrouting.org/repo/el$releasever/extras
     gpgkey: "file://{{ frr_repos_keys | map(attribute='key') | join('file://') }}"
 
-frr_distro_packages:
+_frr_distro_packages:
   - frr
   - frr-pythontools