Add ability to run nailgun tests in parallel on ci

TEST_NAILGUN_DB=nailgun_gw0 nosetests nailgun/test

nosetests uses entry_points, so it requires to run command:

python setup.py develop

Change-Id: Ie5a24d970f73ef35b1c4e61bbc4b2a738d96b34f
Closes-Bug: #1282565
Sync requirements versions with osci

Change-Id: Ib004b5171315c89a4bc51ba5e02c6915e7886f6e
Fix for enormous progress bar rising of deployment task

Weight for node deletion subtask of deployment supertask in
ApplyChangesTaskManager added. New integration tests added. Some
refactoring to TaskHelper performed: formula that calculate progress for
supertask has been moved to separate class method.

Change-Id: I2143f9999320c66b49940844d5b1b7a7f5e2a77c
Closes-Bug: #1286124
Nailgun base objects autodoc & small refactoring

Related to blueprint nailgun-objects-flow

Change-Id: Ia38d9bfcfe351ef96dc47180dc9e94ea2eef55e9
Quick fix for cluster deletion timeout test

Change-Id: I8d8caeb69a0252afa2ac67313ec94091e798a597
Closes-Bug: #1305734
Fuelclient major refactoring

 * package structure
 * some implementation ideas
 * a lot of working functions
 * fixed Fuelclient tests
 * fixed action validation
 * fixed formatting and pep8
 * fixed copyright
 * fixed unnecessary request during deployment

 Implements: blueprint fuelclient-refactoring

Change-Id: Ice7f96273afb5d96e7970acfc45c61bab620aaed
Fix javascript error on settings save failure

Change-Id: Ieb4273d8b3d35722a4da9e647b6ae6f08eff8bf9
Support of setting "values" restrictions (dependencies, conflicts)

Closes-Bug:#1301934

Change-Id: Ia7fd14285b4b15039467f0770d51f61db11e2381
Merge "Add ability to run nailgun tests in parallel on ci"
Merge "Quick fix for cluster deletion timeout test"
Merge "Fuelclient major refactoring"
Merge "Fix javascript error on settings save failure"
Merge "Nailgun base objects autodoc & small refactoring"
Support for X-HTTP-Method-Override header

Change-Id: I2954534be9c691647ad80506dcaafa054317db8b
Merge "Support of setting "values" restrictions (dependencies, conflicts)"
Merge "Sync requirements versions with osci"
Role could be depended on several settings

Change-Id: I2dd3770f9cf13bafd5455407f043f258407553b5
Merge "Support for X-HTTP-Method-Override header"
Merge "Role could be depended on several settings"
Merge "Fix for enormous progress bar rising of deployment task"