fix: update old password hash (deprecated token strategy)

[marrouchi]

Motivation

Updating the password does not update the old hash value in passport collection.

How to reproduce :

• Open OpenHIM (fresh install)
• First login with [email protected] / openhim-password
• Reset password (BUG : passwordHash stays the same)
• Run the openhim mapping mediator -> fails to authenticate.

[codecov]

Codecov Report

Merging #1191 (f259598) into master (6bd1451) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head f259598 differs from pull request most recent head a46c29b. Consider uploading reports for the commit a46c29b to get more accurate results

@@           Coverage Diff           @@
##           master    #1191   +/-   ##
=======================================
  Coverage   86.54%   86.54%           
=======================================
  Files          85       85           
  Lines        5798     5806    +8     
=======================================
+ Hits         5018     5025    +7     
- Misses        780      781    +1     

Impacted Files	Coverage Δ
src/model/users.js	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

[marrouchi]

@nour-borgi Please can you test this locally before approving ? Might be good to refactor and add unit tests ;)