Refactor calico route reflector to run in k8s cluster (#4975)

* Refactor calico-rr to run in k8s cluster with taint

Change-Id: I75a3169ff5b36ce8302fc7ef1c32d3eb697b5afa

* add preinstall checks

* rework calico/rr role

Change-Id: I2f0a7e6cb77cf91ad4a615923680760d2e5d9ca8

* add empty calico-rr group

Change-Id: I006c0a60db9b72d02245bf8fdfabcf982144a5ad

roles/network_plugin/calico/rr/tasks/pre.yml

@@ -0,0 +1,15 @@
+---
+- name: Calico-rr | Disable calico-rr service if it exists
+  service:
+    name: calico-rr
+    state: stopped
+    enabled: no
+  failed_when: false
+
+- name: Calico-rr | Delete obsolete files
+  file:
+    path: "{{ item }}"
+    state: absent
+  with_items:
+    - /etc/calico/calico-rr.env
+    - /etc/systemd/system/calico-rr.service