Add validator for conflicting URLs
Validate project name on API creation and modification
Add tests for is_reserved_name util function
Add test
Merge pull request #992 from PyBossa/issue-schedule-job

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Merge pull request #990 from PyBossa/issue-979-name-validation

Issue 979 name validation
Merge branch 'master' into issue-fix-queues

* master:
  Add test
  Add tests for is_reserved_name util function
  Validate project name on API creation and modification
  Add validator for conflicting URLs