fix(migrate): update lock file path when csp is scaled down

[shubham14bajpai]

Signed-off-by: shubham shubham.bajpai@mayadata.io

What this PR does:
This PR handles the scenario where the csp deployments are scaled up by mistake. The path to the lock file is different for csp and cspi deployments which leads to multiple simultaneous imports. Patching the tmp path while scaling down the csp deployment fixes this problem.

csp Volumes

volumes:
    - hostPath:
        path: /dev
        type: Directory
        name: device
    - hostPath:
        path: /run/udev
        type: Directory
        name: udev
    - hostPath:
        path: /var/openebs/sparse/shared-cstor-pool
        type: DirectoryOrCreate
        name: tmp
    - hostPath:
        path: /var/openebs/sparse
        type: DirectoryOrCreate
        name: sparse
    - hostPath:
        path: /var/openebs/cstor-pool/cstor-pool
        type: DirectoryOrCreate
        name: storagepath
    - emptyDir: {}
        name: sockfile

cspi Volumes

volumes:
    - hostPath:
        path: /dev
        type: Directory
        name: device
    - hostPath:
        path: /run/udev
        type: Directory
        name: udev
    - hostPath:
        path: /var/openebs/cstor-pool/cstor-pool
        type: DirectoryOrCreate
        name: tmp
    - hostPath:
        path: /var/openebs/sparse
        type: DirectoryOrCreate
        name: sparse
    - hostPath:
        path: /var/openebs/cstor-pool/cstor-pool
        type: DirectoryOrCreate
        name: storagepath
    - emptyDir: {}
        name: sockfile

Which issue(s) this PR fixes:
Fixes #82

Special notes for your reviewer:

Checklist

• PR messages has document related information
• Labelled this PR & related issue with documentation tag
• PR messages has breaking changes related information
• PR messages has upgrade related information
• Labelled this PR & related issue with requires-upgrade tag
• Tests updated

[mittachaitu]

I also need to go through an import code path/doc to understand in a case where the process was crashed during the renaming of the pool

[mittachaitu]

changes are good

[mittachaitu]

nit:

Suggested change

	return errors.Wrapf(err, "failed to patch data for csp %s", cspName)
	return errors.Wrapf(err, "failed to get patch data for csp deployment %s", cspName)

[shubham14bajpai]

The error returned by GetPatchData function is wrapped like "failed to generate patch data"

[prateekpandey14]

lgtm