Release 0.52 and start new development cycle

See merge request !2

  Accept an url which contains external configuration
  Split one log per test type

  - Get precise state of all software instances from a Hosting Subscription
  - Get the connection parameters from  all software instances from a Hosting Subscription
  - Get the instance parameters from all software instances from a Hosting Subscription
  - Move all API to connect slapos master to HAL implementation
  - Get the state of the Software Installation
  - Try to connect to monitoring tool in case of error.
  - Use TaskDistributor to determinate the tests (instead local file)
  - Use erp5.util and few erp5testnode features to determinate test revisions.
  - Download informations from the Task distributor instead use parameters (it makes implementation more flexible).

networkbench: Include ping6 and TTFB support

  Replace urlib by pycurl to get the 'Time To First Byte' responses.
  Include ping6 support
  Verbose how much package lost the connection had in case of package lost.

See merge request !1

  Replace urlib by pycurl to get the 'Time To First Byte' responses.
  Include ping6 support
  Verbose how much package lost the connection had in case of package lost.

Python 2.7.9 enabled SSL certificate verification by default (PEP476).
This commit disables certificate verification by creating
a non-verifying SSL context.