Integration test refactoring (#126)

* integration test refactoring

* config file cleanup

* more test refactoring

* remove debug file

* moving around more files

* fixing up integration tests

* integration tests work

* some housekeeping

* fixing tests

* addressing comments

* debugging

* debugging

* actual debugging

* skip integration tests for travis

* install container-diff before integration tests

* syntax

* make test failures less noisy

* fixing tests

* hopefully fixing CI?

* fixes

* more fixes

* let's actually fix CI

* more testing

* testing

* proper auth

* typos

* adding support for args in integration tests

* formatting

* formatting

* adding support for testing bucket context

* adding bucket test dockerfile

* addressing comments

* syntax

integration/dockerfiles/Dockerfile_test_workdir

@@ -0,0 +1,17 @@
+FROM gcr.io/google-appengine/debian9@sha256:6b3aa04751aa2ac3b0c7be4ee71148b66d693ad212ce6d3244bd2a2a147f314a
+COPY context/foo foo
+WORKDIR /test
+# Test that this will be appended on to the previous command, to create /test/workdir
+WORKDIR workdir 
+COPY context/foo ./currentfoo
+# Test that the RUN command will happen in the correct directory
+RUN cp currentfoo newfoo
+WORKDIR /new/dir
+ENV dir /another/new/dir
+WORKDIR $dir/newdir
+WORKDIR $dir/$doesntexist
+WORKDIR /
+
+# Test with ARG
+ARG workdir
+WORKDIR $workdir