The questionnaire is not really resetting itself

[Tomer Gueta]

After answering the questionnaire >> Flagging >> returning to the questionnaire and changing the answers >> some input from the first of the questionnaire session still exist.
A simple example:

Fresh bdclean session>> answering the questionnaire:

Performing flagging:

Results:

Now, changing the questionnaire to:

Results aren't changing as they should:

For more details see QA working file:
https://docs.google.com/spreadsheets/d/1VFhHy6uo7qVBiHhcuLqUJ3RXKpaG-4C3RD0jqvB0xtU/edit#gid=21537633&range=11:11

[Thiloshon Nagarajah]

This is caused because BDQuestion reference class wasnt resetting when questionnaire is changed. The old values still remained. This is fixed now

[Thiloshon Nagarajah]

#56