PLD: test for chart response format
PLD: get labels for multichoice and split options, closes #510
PLD: update test to expect list
UK/DW: Return string instead of list for html chart output
Merge branch 'master' into 510-chart-response-format

* master:
  PLD: check that obj exists and test this
  UK: update oauth2 step 3 to indicate use of basic auth client_id:client_secret
  PLD: use class name vars over strings
  PLD: more tests, cannot use helper since org members do not have org specific perms
  PLD: set role for org profile user list, closes #533