Fix bug in reading framework CLI path variable

Fixes a bug that prevented file copier from working when CLI was not specified.

Add features and tests to service upgrades

Adds option to remove labels and environment variables during service upgrades

Adds option to alter or add dataVolumes during service upgrades

Adds testing for manipulation of launchConfig during service upgrades

Fall back on upgrade to current launch config

Fixes some bugs:

• update new containers that do not have an upgrade value
• fix some null pointers in file copier

Fix JSON parsing and storage retrieval

Parse labels and OS environment with jackson parser
Look in project and framework storage for paths to secret keys
Throw exception when keys are not found

Add stack/add service

Provides two new step plugins to create a new stack and to create a new service in a stack.

This work also contains a minor change to the UI for upgrading a service in that labels and OS environment variable values used in upgrading are now entered as JSON object members instead of the earlier ad-hoc format

Add some testing

Adds tests for ModelSource and for UpgradeService.

Improve nodeEntry isolation during nodeSet creation

Put data associated with each node in a separate object to ensure date from multiple nodes is processed correctly. Also, suppress full node JSON data dump to ensure sensitive data is not leaked through logs.

Fix exception handling in node executor

When node execution failed, it could leak info from the node configuration into system logs.

Add icon and remove requirement to specify labels/env.

Merge pull request #10 from kdebisschop/add-rancher-icon

add rancher icon

0.7.0

Implements service upgrade Node Step Plugin