docker-storage-setup: Make growpart semantics a little clearer
docker-storage-setup: Make growpart semantics a little clearer

Currentl growpart code only works on ROOT_PVS. But we set GROWPART=1 in
two conditions.

- Either we are working on ROOT volume group.
- Or user has passed in some devices using DEVS.

Second condition seems little odd. Why do we want to grow partition of
a root device while user might be adding some disk to a separate volume
group. (DEVS=sda VG=foo).

To me growpart should either try to grow root always or never. That makes
the semantics much more clear.

To make semantics of growpart more clear, for now enable it by default
in all conditions. A later patch will disable it by default and provide a
knob to enable it.

Signed-off-by: Vivek Goyal <61d11262d0d9873ddb5a887f48fcb04e8c5973d0@redhat.com>

shishir-a412ed/docker-storage-setup,thescriptbender/container-storage-setup