Added cilium support (#2236)

* Added cilium support

* Fix typo in debian test config

* Remove empty lines

* Changed cilium version from <latest> to <v1.0.0-rc3>

* Add missing changes for cilium

* Add cilium to CI pipeline

* Fix wrong file name

* Check kernel version for cilium

* fixed ci error

* fixed cilium-ds.j2 template

* added waiting for cilium pods to run

* Fixed missing EOF

* Fixed trailing spaces

* Fixed trailing spaces

* Fixed trailing spaces

* Fixed too many blank lines

* Updated tolerations,annotations in cilium DS template

* Set cilium_version to iptables-1.9 to see if bug is fixed in CI

* Update cilium image tag to v1.0.0-rc4

* Update Cilium test case CI vars filenames

* Add optional prometheus flag, adjust initial readiness delay

* Update README.md with cilium info

roles/network_plugin/cilium/templates/cilium-config.yml.j2

@@ -0,0 +1,29 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: cilium-config
+  namespace: {{ system_namespace }}
+data:
+  # This etcd-config contains the etcd endpoints of your cluster. If you use
+  # TLS please make sure you uncomment the ca-file line and add the respective
+  # certificate has a k8s secret, see explanation bellow in the comment labeled
+  # "ETCD-CERT"
+  etcd-config: |-
+    ---
+    endpoints: 
+{% for ip_addr in etcd_access_addresses.split(',') %}
+    - {{ ip_addr }}
+{% endfor %}
+    #
+    # In case you want to use TLS in etcd, uncomment the following line
+    # and add the certificate as explained in the comment labeled "ETCD-CERT"
+    ca-file: "{{ cilium_cert_dir }}/ca_cert.crt"
+    #
+    # In case you want client to server authentication, uncomment the following
+    # lines and add the certificate and key in cilium-etcd-secrets bellow
+    key-file: "{{ cilium_cert_dir }}/key.pem"
+    cert-file: "{{ cilium_cert_dir }}/cert.crt"
+
+  # If you want to run cilium in debug mode change this value to true
+  debug: "{{ cilium_debug }}"
+  disable-ipv4: "{{ cilium_disable_ipv4 }}"