Add replication factor as env to jiva controller

[kmova]

Signed-off-by: kmova [email protected]

What this PR does / why we need it:
The jiva controller needs to determine whether to have the volume as read-only/read-write based on the quorum from the replicas. When the count is not available (in 0.5.x), controller was depending on the registration process to determine the number of replicas that are connected. This auto-registration process leads to several race conditions for determining - whether the volume will be launched with a single replica or multiple replicas. By passing this replication factor, controller will handle the cases for multiple replica's better.

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:
Related to : openebs-archive/jiva#83

[kmova]

The controller spec generated with the fix is as follows:

spec:
  containers:
  - args:
    - controller
    - --frontend
    - gotgt
    - --clusterIP
    - 10.47.255.236
    - pvc-9e6c7860-85b9-11e8-9ef7-42010a800016
    command:
    - launch
    env:
    - name: REPLICATION_FACTOR
      value: "1"
    image: openebs/jiva:0.6.0-RC3
    imagePullPolicy: IfNotPresent
    name: pvc-9e6c7860-85b9-11e8-9ef7-42010a800016-ctrl-con
    ports:
    - containerPort: 3260
      protocol: TCP
    - containerPort: 9501
      protocol: TCP
    resources:
      requests:
        cpu: 100m
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: default-token-nr792
      readOnly: true

[AmitKumarDas]

When kubectl scale up/down is done to the Replica deployment, this ENV i.e. Controller deployment needs to be patched.

[codecov]

Codecov Report

Merging #388 into master will decrease coverage by 0.04%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #388      +/-   ##
==========================================
- Coverage   29.37%   29.33%   -0.05%     
==========================================
  Files          65       65              
  Lines        5514     5523       +9     
==========================================
  Hits         1620     1620              
- Misses       3720     3729       +9     
  Partials      174      174

Impacted Files	Coverage Δ
orchprovider/k8s/v1/k8s.go	34.4% <0%> (-0.36%)	⬇️

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[prateekpandey14]

lgtm