Patch Upgrade using CLI

Use the upgrade controller image_ref <image name> controller_patch_ref <Controller patch image command to upgrade the Avi Load Balancer Controller with a patch.

[admin:-controller]: upgrade controller image_ref 18.2.6-9000-20191031.063017 controller_patch_ref 18.2.6-2p1-20191031.063017

[admin:controller]: > patch controller <patch-name>

[admin:controller]: > patch controller controller_patch 18.2.5-5p1