update convict from 0.0.6 to 0.4.1

anti bit rot
Merge pull request #3973 from seanmonstar/convict-0.4.0

update convict from 0.0.6 to 0.4.0

tests pass, front end, back end and Selenium. Thanks for working with me @seanmonstar, the updates make configuration significantly more understandable. r+