Update base images to openwhisk/dockerskeleton:1.3.2. and adjust tests for upstream changes.

Formats all .scala files according to `scalafmt`'s (opinionated) style. 
Adds Travis checks for correctly formatted code.

Also, change working directory for Python actions to allow relative path access to file system.

Re-enable build swift/python containers (for tests to run).
Add unicode unit test for swift action container.
Allow for reinit with swift for use with invoke.py.
Fix unicode regression for swift actions.
Refactor unicode tests to add coverage - now also for base action container.
Set string encoding to utf-8 for swift action proxy.
Rewrite result extraction to avoid splitting and printing logs one line at a time.
Skip decoding when process output is a string; already utf-8.

Consolidate base64 encoding in CLI; remove Jar field in exec.

Update tests to work in both Python 2 and Python 3.
Rename pythonaction to python3action for container image name for clarity.
Add tests for python:2 and python:3.
Add image names for all the actions. Rename javaaction to java8action for consistency.

- Remove unused dependencies
- Define dependencies as compile time to be able to include them from other projects
- Standardize layout

* Bumping restassured version

* Update gitignore to include .cache-tests

Refactoring of init method into an init-from-source and init-from-zip.
Support a zip file containing more than one python file.
The zip file must contain a file called __main__.py that defines a "main" method.

Log an error when python zip does not include required file.

* Add kafka_python library to the Python action runtime

* Update doc and Python package sniff test

Please squash into previous commit

Note: Skipping python and swift CLI tests - container test is still in place - while investigating Travis.

Add npm openwhisk package to NodeJS images, and deprecation warning for uses of the 'whisk' context object.

Make OpenWhisk related environment variables available in all container runtimes.

up to 2 minutes

test url openwhisk.ng.bluemix.net/api/v1

test url is now openwhisk.ng.bluemix.net/api/v1

Additionally:
    - pinned versions
    - tests
    - added to reference doc

- Add the requests module to the python container
- Add tests to assert that module installation for the python container works as expected.

Solves #1190

Adds a new parameter to docker.gradle `dockerImagePrefix` which specifies the PREFIX part in the following format: {REGISTRY}/{PREFIX}/{IMAGE}:{TAG}. This used to be hardcoded to "whisk", e.g. whisk/controller.

Implements a parameter for ansible to pull an image prefixed by "docker_image_prefix" (PREFIX in the following format): {REGISTRY}/{PREFIX}/{IMAGE}:{TAG}. Was previously hardcoded as "whisk".

Writes the parameter into whisk.properties and makes the invoker pick it up for spawning containers.

Add different tag in travis to flesh out problems.

It's probably best that the tests and the invoker use the same client.

Add new tests for the common action proxy. Refactor tests so that standard tests for actions not returning JSON, actions printing to stdout/stderr, and actions validating expected environment don't need to be repeated explicitly. Also tightened tests so that the runtimes conform to expected messages/errors and markers on stdout/stderr. As noted, new tests added to confirm action environment contains expected properties - namely auth key and edge host.

Also introduces warnings on unused imports.

Add compilation for init with check for compilation errors and modify test accordingly (fixes #493).
Add test for bug fix related to unsafe parameter passing ({x: null} for example)

Limit stack trace to exclude proxy.
Add CLI test for #493.
Remove println in test.

Fix hello python sample action to fit the same pattern as the js and swift actions.

Remove semicolons from PingTests.

Replace List with Vector since former is deprecated in JsArray. Use canonical retry and delete otherwise unused trait.

Remove obsolete comment.

Swift actions are now compiled at `init` time, then ran as a simple binary,
rather than always be interpreted using `swift`. First invocation is only
slighltly slower, all following are dramatically faster. Compile-time errors
are reported as before. Note that if/when the container gets garbage-collected,
the binary is not persisted so will be recompiled at following deployment.