Kill window manager instead of trying to stop it

Fluxbox insists in not stop gracefully and the UI automation still
hanging. Because this, is better to send SIGKILL directly.
Port old API tests for repositories

Completely rewrite existing tests in module `test_repository_v2`. Make them more
terse, efficent and thorough. Drop module `test_repository`, as the "v2" module
now performs its responsibilities.
Port some old API tests for content views

Port all non-stubbed API tests for content views. Move those tests into either
`test_contentview_v2` or `test_contentviewversion_v2`.

Use FauxFactory to generate some random data instead of the orm fields.
Improve foreman task pooling

Checking for state is the better approach to verify if the task is
running or not. Also reduced the timeout because this improvement.
Fix product path to handle a None which

Add a check for which not being None before calling startswith.
Merge pull request #1438 from elyezer/api-task-pooling

Improve foreman task pooling
Merge pull request #1439 from elyezer/fix-product-path

Fix product path to handle a None which
Merge pull request #1436 from elyezer/wm-kill

Kill window manager instead of trying to stop it
Merge pull request #1427 from Ichimonji10/test-repository

Port old API tests for repositories
Merge pull request #1437 from Ichimonji10/test-contentview

Port some old API tests for content views
"Added test for partition-table - remove operating system"

"Added test for partition-table - remove operating system"

"Added test for partition-table - remove operating system"
Merge pull request #1431 from tkolhar/test_cli_second

Added test for partition-table
Updated test_multiple_paths for sam fencing
Merge pull request #1435 from sthirugn/fix_multiple_paths

Fenced test_multiple_paths for sam test