Refactor functional tests to use junit test suites

 - Created two test suites on each project, a StandardTestSuite used in pull requests and a RegressionTestSuite
 - StandardTestSuite tries to group tests which runs in the same environment
 - minor changes in scheduler tests to use a non-restart mode whenever possible
 - minor reaffectations to regression tests

 - Improvements of job log folder removal, due to failed TestJobServerLogs

 - FailTaskConditionally : improve sleep to avoid premature ending of task
   on slow machines
 - timeoutSelection.xml : change groovy script implementation to avoid
   failures on windows