subtests.docker_cli.build: Turn build test into subsubtest

No actual changes, only couple fixed pep8 complains and the test is
rewritten to build/local_path subsubtest.

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
subtests.docker_cli.build: Add two new subtests

These subtests use https and git repository as source path for
docker build.

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
Merge branch 'build' of https://github.com/ldoktor/autotest-docker into ldoktor-build
subtests...build: Config. example build URIs

Signed-off-by: Chris Evich <cevich@redhat.com>
Merge branch 'ldoktor-build'