Free up loopdevice after image is built

[kishen-v]

Fixes: #591

Before image creation:


[root@pvsadm-tester1 bin]# df -h /
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  233G   11G  223G   5% /

After image creation:

[root@pvsadm-tester1 bin]# df -h /
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  233G   17G  217G   7% /

After deleting image that was created.

[root@pvsadm-tester1 bin]# df -h /
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  233G   15G  219G   7% /

---

With Fix

Before Image creation


[root@pvsadm-tester1 bin]# df -h /
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  233G   11G  223G   5% /

After image creation

[root@pvsadm-tester1 bin]# df -h /
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  233G   13G  221G   6% /



After deleting the image that was created.

(Avail space before image creation = Avail space after image creation)

[root@pvsadm-tester1 bin]# df -h /
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/cl-root  233G   11G  223G   5% /

The built image was tested on PowerVS to ensure its functioning.

[kishen-v]

This function definition is unused.

[Amulyam24]

Thank you for the quick fix @kishen-v. LGTM!

[mkumatag]

/lgtm

[ppc64le-cloud-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishen-v, mkumatag

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [mkumatag]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment