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.

Fix link to db README.

Remove deadcode.

Move gradle helper to gradle directory and update all path.

Adding eclipse configuration files for codestyle

Refactoring docker tasks, adding dockerWithRetry back in

Run gradle clean in ant clean

Adding missing dependencies on common scala

Remove CMD from Dockerfile since further specification is needed by the caller

More idiomatic usage of gradle to generate eclipse project files for all projects (root and cli stay for the moment)

Using the configured SSL certificate in tests

Prevent travis from running gradle assemble, as it is not expected by our current build

Higher verbosity for test logs to make spotting issues from logs alone possible

Idiomatic configuration of scala compilation using resources

Setting DOCKER_HOST to mainmachine to build there

Signed-off-by: Fatih Ulusoy <ulusoy@de.ibm.com>