A change that also applies to traditional tests is that the password does not
need to be known when logging with basic authentication. If the given password
is empty (e.g. 'ERP5TypeTestCase:'), password validation passes regardless the
actual password: to keep things secure, this exception is only valid for the
test thread and during the call to publish(). This is a simple way to deal with
random passwords in live tests.

This results with calling correct methods on the server.

This hopefully fix the random issue of having test results not linked to
a project. Indeed, distributor/createTestResult was called in two different
times:
- by the testnode, with the project title
- by the runTestSuiteCommand, without the project title. This was
  not an issue most of the time, since the test result is already
  created. But if it was not there (like due to a cancelled test),
  a test result without project was created

erp5/tests/testERP5TestNode.py: Fix test_scalability_04_constructProfile. repository option is required for scalability test profile and it was added on commit 58d92a84.

erp5/tests/testERP5TestNode.py: Fix test_zzzz_scalability_19_xxxx. prepareFrontendMasterInstance was removed on commit 4048ab39.

erp5/util/testnode, scalability_test: Stop using a dummy frontend master and use host.vifib.net frontend with a valid SSL certificate instead. Always use https.

Conflicts:
	scalability_test/__init__.py

erp5/util/testnode: hosting subscription url was not updated once it was set. As a result, since testnode watched an old destroyed instance, the next test never started. Thus don't store hosting subscription url. It changes from time to time.

erp5.util.testbrowser: Refactor of openNoVisit() and {Image,Submit}Control for recent zope.testbrowser (followup of 5a0b3763).

Instead of sleeping, try using an API method until it stops raising
ConnectionError.

/reviewed-on nexedi/erp5!650

- hardcoded parameter removed
- minor changes in slapos master communicator

- allow slapos master communicator to supply software destruction
- runner reinstalls software on every commit (temporarily)
- refactor in software profile construction
- some try controls added

/reviewed-on nexedi/erp5!644

- before create a new instance checks if the current testsuite has an old one
- re-uses file-dictionary functions of frontend software checks
- minor fixes

/reviewed-on !615

By using `os.path.normpath` we also support paths with a trailing slash.

- requests to bootstrap and site availability urls using a script run with userhosts
- hardcoded parameters removed
- try-exception controls in communication with master
- general refactoring and cleanup

- test duration is get from testsuite definition
- refactoring and cleanup in runScalabilityTestSuite and benchmark
- request timeout in metric thread

/reviewed-on !607

- bug fixing while getting instance_guid
- minotr refactoring in request parameters

This should fix the problem that `Revision History` is unusable on test
results because tests have a different name when they have been running
on different paths

This will be used to run tests using interpreter with pre-installed
eggs, generated with zc.recipe.egg's interpreter

- testnode saves in its config the repositories paths
- minor refactoring and cleanup

/reviewed-on !606

- the commands to run the tests are launched using threads
- a thread is used to ask instance for metrics periodically
- refactoring for a more generic code
- refactoring in log handling
- old code related to created documents and create users removed
- new script parameters
- general refactoring and cleanup

- hardcoded software release url removed (http with password protection for now)
- scalability runner handles frontend request. It asks for a local master frontend apache software installation and instance request.
- testsuite brings the urls corresponding to instance, bootstrap, metrics collection.
- vinculation between scalability runner and runScalability script. Process manager is used to run the script as a command.
- scalability runner manages the test result cases and loops among different testsuite configurations.
- userhosts software is used to run the command for the runScalability script, to solve DNS.
- refactoring according to last changes in TaskDistribution
- general refactoring and cleanup

- communicator considers requests of master frontend and instance destruction.
- communicator retrieves frontend related information from instances.
- minor refactoring and code cleanup.

- TestThread runs a target command using a testnode-process-manager
- TestMetricThread makes a get request to a target url periodically and collects the responses