[Docker driver] code coverage

Review in progress for https://review.opencontrail.org/43912
Submitter: Michal Kostrzewa (<email address hidden>)

Review in progress for https://review.opencontrail.org/43914
Submitter: Michal Kostrzewa (<email address hidden>)

Review in progress for https://review.opencontrail.org/43912
Submitter: Michal Kostrzewa (<email address hidden>)

Review in progress for https://review.opencontrail.org/43914
Submitter: Michal Kostrzewa (<email address hidden>)

Reviewed: https://review.opencontrail.org/43914
Committed: http://github.com/Juniper/contrail-windows-docker-driver/commit/4d4a92f05979bbf648aeedf95679edbfecbf183a
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit 4d4a92f05979bbf648aeedf95679edbfecbf183a
Author: Michal Kostrzewa <email address hidden>
Date: Mon Jun 18 13:23:04 2018 +0200

Add building script.

This change is being submitted as separate change, because adding build
tags will break Windows CI.

The order of operations is:

1. Merge this change.
2. Use ./Invoke-Build.ps1 in Windows CI
3. Merge the change that adds build tags and updates ./Invoke-Build.ps1

Change-Id: I534a4086ea3b11f1a09ce37e750e506468eb3943
Partial-Bug: #1777423

Review in progress for https://review.opencontrail.org/44050
Submitter: Michal Krasnoborski (<email address hidden>)

Review in progress for https://review.opencontrail.org/44080
Submitter: Michal Kostrzewa (<email address hidden>)

Reviewed: https://review.opencontrail.org/44050
Committed: http://github.com/Juniper/contrail-windows-docker-driver/commit/8d11cd14a3e2870b5d1e895fb04797e32727aded
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit 8d11cd14a3e2870b5d1e895fb04797e32727aded
Author: Michał Krasnoborski <email address hidden>
Date: Fri Jun 22 10:21:59 2018 +0200

Add missing licenses and update year

1. Add missing licenses
2. Update the year on licenses

Change-Id: I26d49f1793618b0ff2ea89c7b7ce5fa2a059eb49
Partial-Bug: #1777423

Review in progress for https://review.opencontrail.org/44080
Submitter: Michal Kostrzewa (<email address hidden>)

Reviewed: https://review.opencontrail.org/44080
Committed: http://github.com/Juniper/contrail-windows-docker-driver/commit/ea385b6fa35e92a9ee6f29bf6c8adbf13f60a69a
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit ea385b6fa35e92a9ee6f29bf6c8adbf13f60a69a
Author: Michal Kostrzewa <email address hidden>
Date: Mon Jun 25 11:13:17 2018 +0200

Build MSI installer in Invoke-Build.ps1.

It's very hard to introduce Invoke-Build.ps1 to CI without also
providing a way to build the MSI. The best way to fix it is to introduce
a way to build the MSI directly in the docker driver repository.

We create wix_new.json file for now. We change the path specified inside
it. If we modify wix.json, CI fails. We can throw out wix.json and
rename wix_new.json to wix.json later - after we start using
./Invoke-Build.ps1 in CI.

Change-Id: I3dc380ede3ad52890e4e9763569fbcd8833915fd
Partial-Bug: #1777423

Review in progress for https://review.opencontrail.org/43912
Submitter: Michal Kostrzewa (<email address hidden>)

Reviewed: https://review.opencontrail.org/43912
Committed: http://github.com/Juniper/contrail-windows-docker-driver/commit/ab523a6f5a7edbaf80a5fe43453086befcb22d75
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit ab523a6f5a7edbaf80a5fe43453086befcb22d75
Author: Michal Kostrzewa <email address hidden>
Date: Mon Jun 18 13:01:27 2018 +0200

Code coverage collection.

Implements powershell scripts that wrap go tools for code coverage
statistics.

Due to how these tools work, some changes to code had to be made:
* Write dummy empty files with "_test" suffix, so that respective
modules are taken into account when calculating total code coverage
* Add build tags for unit and integration tests, because they would be
potentially run at different moments in CI

Also, since the build tags were introduced, a build script was also
implemented that uses them.

Change-Id: Idbdc30c64e17b68d9d4b4558721cd5b245421d0f
Closes-Bug: #1777423