Bumping up the K8S_VERSION to 1.12.7 to address b/129316692
Bumping up the K8S_VERSION to 1.12.7 to address b/129316692

Note this only fixes 16.04. For 14.04 we've release own debs that have
to be rebuilt.

Change-Id: I621bfee9b7a6a2c93cd4e202766cdd131ab0360a
GitOrigin-RevId: 5e4edda156c3b86781f6467371744447222bcdc9

googlecloudrobotics/core,googlecloudrobotics/core,googlecloudrobotics/core