[#363] Add test harness method to recreate all locales

* called by http://flowhost/webapp/testharness?action=recreateLocales
Merge pull request #499 from akvo/feature/363-locale-creation

[#363] Add test harness method to recreate all locales
[#500] Release notes FLOW version 1.6.14
Merge pull request #501 from akvo/1.6.14/notes

[#500] Release notes FLOW version 1.6.14
[#363] Cluster over all surveys
Merge pull request #502 from akvo/1.6.14/all-survey-clustering

[#363] Cluster over all surveys
[#363] Save reference to surveyedLocale when reingesting instance
Merge pull request #503 from akvo/feature/363-reingest-fix

[#363] Save reference to surveyedLocale when reingesting instance
Merge branch 'release/1.6.14'
Merge branch 'master' into develop