Changed docker image tag for cvp-sanity-checks to 2019.2.6

Updated the tag due to the following related PROD fixes:
- PROD-32021
- PROD-33626
- PROD-32301
- PROD-30705
- PROD-23832
- PROD-32415

Change-Id: Ib84cc0c86f8c62df7c3694de10932af8309210a2
Related: PROD-32021
Related: PROD-33626
Related: PROD:32301
Related: PROD-30705
Related: PROD-23832
Related: PROD-32415
1 file changed