Fix fact tags

Ansible playbook fails when tags are limited to "facts,etcd" or to
"facts". This patch allows to run ansible-playbook to gather facts only
that don't require calico/flannel/weave components to be verified. This
allows to run ansible with 'facts,bootstrap-os' or just 'facts' to
gether facts that don't require specific components.

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

roles/network_plugin/flannel/tasks/main.yml

@@ -46,7 +46,6 @@
 
 - set_fact:
     flannel_subnet: "{{ flannel_subnet_output.stdout }}"
-  tags: facts
 
 - name: Flannel | Get flannel_mtu from subnet.env
   shell: cat /run/flannel/subnet.env | awk -F'=' '$1 == "FLANNEL_MTU" {print $2}'
@@ -56,7 +55,6 @@
 
 - set_fact:
     flannel_mtu: "{{ flannel_mtu_output.stdout }}"
-  tags: facts
 
 - set_fact:
     docker_options_file: >-
@@ -70,7 +68,6 @@
 
 - set_fact:
     docker_network_options: '"--bip={{ flannel_subnet }} --mtu={{ flannel_mtu }}"'
-  tags: facts
 
 - name: Flannel | Ensure path for docker network systemd drop-in
   file: