Fix bad creds E2Es

[lucaspin]

For some reason, quotes are being added to the the URL now.

GCR:

actual   -> Error response from daemon: Get \"https://gcr.io/v2/\": unauthorized: GCR login failed. You may have invalid credentials. To login successfully, follow the steps in: https://cloud.google.com/container-registry/docs/advanced-authentication\n
expected -> Error response from daemon: Get https://gcr.io/v2/: unauthorized: GCR login failed. You may have invalid credentials. To login successfully, follow the steps in: https://cloud.google.com/container-registry/docs/advanced-authentication\n

Docker registry:

actual   -> Error response from daemon: Get \"https://registry-1.docker.io/v2/\": unauthorized: incorrect username or password\n"
expected -> Error response from daemon: Get https://registry-1.docker.io/v2/: unauthorized: incorrect username or password\n"