Deleted all unused code - see BACKLOG-1328 - in EB
Dropped table virtual_organisation_attribute as we do not longer use it
Deleted Attribute Aggregation as we don't use it
Delegated the call to validate the VO membership to API - configurable in engineblock.ini
Generic help splitted in help section for consent and discover according new translations
Add tests for EngineBlock_Corto_Filter_Command_ValidateVoMembership and changed the url for validation according API specification
Pulled the validation of VO's back into EB, apart from the validation if a member is part of group(s)
EB now uses client credentials to obtain an access token for the retrieval of Groups from API. The key and secret are placed in the engineblock.ini to prevent refactoring when migrating to apis. The access token is cached in between calls using Zend_Cache
New release notes for 3.9.0 release
Merge branch 'feature/BACKLOG-1328-delete-unused' into develop

Conflicts:
	library/EngineBlock/Corto/Filter/Output.php
composer update after simplesaml php upghrade
Merge branch 'feature/BACKLOG-1260-new-translations-wayf-consent' into develop
Merge branch 'feature/BACKLOG-727-vo-team-agnostic' into develop
Added instructions for upgrading EB to 3.9.0
fixed broken markdown notation for release notes
Bugfix for not having deleted the provisioning code and config
Merge commit '6f727fcb1c792dd1990e82221b7f7c0ca716cdfc' into feature/refactor-corto-xml2array

# By oharsta
# Via oharsta
* commit '6f727fcb1c792dd1990e82221b7f7c0ca716cdfc':
  Bugfix for not having deleted the provisioning code and config
  fixed broken markdown notation for release notes
  Added instructions for upgrading EB to 3.9.0
  composer update after simplesaml php upghrade
  New release notes for 3.9.0 release
  EB now uses client credentials to obtain an access token for the retrieval of Groups from API. The key and secret are placed in the engineblock.ini to prevent refactoring when migrating to apis. The access token is cached in between calls using Zend_Cache
  Pulled the validation of VO's back into EB, apart from the validation if a member is part of group(s)
  Add tests for EngineBlock_Corto_Filter_Command_ValidateVoMembership and changed the url for validation according API specification
  Generic help splitted in help section for consent and discover according new translations
  Delegated the call to validate the VO membership to API - configurable in engineblock.ini
  Deleted Attribute Aggregation as we don't use it
  Dropped table virtual_organisation_attribute as we do not longer use it
  Deleted all unused code - see BACKLOG-1328 - in EB

Conflicts:
	library/EngineBlock/Corto/Filter/Command/Abstract.php