Server side changes to improve .msapp format.

[MikeStall]

Improve the real .msapp format to make conversions easier.

As general principles:

• avoid double json encoding because that breaks checksums.
• separate out volatile information (timestamps, per-environment) from stable information.
• remove fields that are redundant or don't need to be emitted.

Some specific things:

• Double encoding in PCF controls
• Double encoding in Properties.json
• Test cases. (see updates in Add support for Test Suites and Test Cases #52)

[lesaltzm]

• References/Templates.json - CustomProperties are overly complex and cannot be recreated without the server

[lesaltzm]

• General noise in properties.json

• Component Instances have an Index the same as their parents (the only non-top-level control with an index != 0)

• PublishInfo.Background color gets set by RP after save to lowercase RGBA?

• Some service connectors serialize both Wadl and Swagger, discussed with Reza, we likely only need one, probably swagger

• Control UniqueIds are noisy, and are recreated by the server on load anyway, consider skipping them

• ViewInfo objects have invariant names that are prefixed with an environment-specific guid, can move that to be a DataSetName property

• Group Container .oam is not included in the .msapp (either wait for package feeds, or add the control template)

[MikeStall]

#161 - remove timestamp in sarif files.

[lesaltzm]

Sample Resources and Sample Data should not be written to the .msapp. The studio should be able to recreate them on load.