Remove -e flag from docker login
Remove -e flag from docker login

- Builds are failing because CI is not able to login to docker
because -e (email) flag is deprecated.

Signed-off-by: Akash Srivastava <15666bd2e5014c3734779fb1c9463d46d5aa58d5@gmail.com>

weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope