Use all usable tests when calculating coverage
Use all usable tests when calculating coverage

Change coverage Makefile target name to "coverage" to show that it uses
more than just the dbus-tests subset of tests.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

stratis-storage/stratis-cli,stratis-storage/stratis-cli