fix(cspi): add timeout seconds in zfs cmd used for liveness probe and safe-evict annotation on CSP

[prateekpandey14]

What this PR does / why we need it:

• add 120 seconds cmd timeout value for zfs command which will
  kill the cmd process if it exceeds more than 120 seconds and
  returns non-zero exit status.
• Change Probe timeout seconds to 150 seconds.
• Change PeriodSeconds interval to 60 seconds
• add safe-to-evict to false to disable scaledown for CSP pods refer feat(CA): safe-to-evict to false to disable scaledown for CSPI pods #1481

k get pods cspc-sparse-jbhs-666bcf6788-thtgf -oyaml
apiVersion: v1
kind: Pod
metadata:
  annotations:
    cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
    openebs.io/monitoring: pool_exporter_prometheus
    prometheus.io/path: /metrics
    prometheus.io/port: "9500"
    prometheus.io/scrape: "true"
  creationTimestamp: "2019-12-11T10:02:06Z"
  generateName: cspc-sparse-jbhs-666bcf6788-
  labels:
    app: cstor-pool
    openebs.io/cstor-pool-cluster: cspc-sparse
    openebs.io/cstor-pool-instance: cspc-sparse-jbhs
    openebs.io/version: 1.5.0
    pod-template-hash: 666bcf6788
- env:
    - name: OPENEBS_IO_CSTOR_ID
      value: 83d34ac9-0e1a-4ef1-9260-0aef4b22dd18
    - name: OPENEBS_IO_POOL_NAME
      value: 8cfb0830-745c-4a26-8319-819675c29383
    image: openebs/cstor-pool:ci
    imagePullPolicy: IfNotPresent
    lifecycle:
      postStart:
        exec:
          command:
          - /bin/sh
          - -c
          - sleep 2
    livenessProbe:
      exec:
        command:
        - /bin/sh
        - -c
        - timeout 300 zfs set io.openebs:livenesstimestamp="$(date +%s)" cstor-$OPENEBS_IO_POOL_NAME

Signed-off-by: prateekpandey14 [email protected]

[mittachaitu]

changes are good