This fixes a bug where `make cover` was missing packages. The target now
covers all code except for code placed in the top level package (such as
main.go) and anything placed in the testutils directory.
This also fixes minor issues with the Dockerfile and the coverage_check
script
Note that this commit also strives to increase code coverage beyond the
80% margin
Change-Id: I9e1cbcf841cc869345a00f05e39774cb3da10065
dc9c78b210