Removed config maps and replaced with rados omaps

Existing config maps are now replaced with rados omaps that help
store information regarding the requested volume names and the rbd
image names backing the same.

Further to detect cluster, pool and which image a volume ID refers
to, changes to volume ID encoding has been done as per provided
design specification in the stateless ceph-csi proposal.

Additional changes and updates,
- Updated documentation
- Updated manifests
- Updated Helm chart
- Addressed a few csi-test failures

Signed-off-by: ShyamsundarR <srangana@redhat.com>

examples/rbd/snapshotclass.yaml

@@ -5,19 +5,16 @@ metadata:
   name: csi-rbdplugin-snapclass
 snapshotter: rbd.csi.ceph.com
 parameters:
-  pool: rbd
-  # Comma separated list of Ceph monitors
-  # if using FQDN, make sure csi plugin's dns policy is appropriate.
-  monitors: mon1:port,mon2:port,...
-  # OR,
   # String representing a Ceph cluster to provision storage from.
   # Should be unique across all Ceph clusters in use for provisioning,
   # cannot be greater than 36 bytes in length, and should remain immutable for
   # the lifetime of the StorageClass in use.
-  # If using clusterID, ensure to create a secret, as in
-  # template-ceph-cluster-ID-secret.yaml, to accompany the string chosen to
-  # represent the Ceph cluster in clusterID
-  # clusterID: <cluster-id>
+  # Ensure to create an entry in the config map named ceph-csi-config, based on
+  # csi-config-map-sample.yaml, to accompany the string chosen to
+  # represent the Ceph cluster in clusterID below
+  clusterID: <cluster-id>
+
+  pool: rbd
 
   csi.storage.k8s.io/snapshotter-secret-name: csi-rbd-secret
   csi.storage.k8s.io/snapshotter-secret-namespace: default