Fix for wells_with to add support for non-str values

[yangchoo]

We added support for non-str values in properties as part of PR190. We did not update wells_with and this adds in the missing support.

[joshhacksthings]

Looks good, but would you mind adding a few more container_tests that include testing properties with values that include:

• Booleans
• Floats

That would cover the types that apps currently uses in ali props

[joshhacksthings]

I also want to add a comment here that TX's internal infrastructure (WEB) prohibits the use of anything except for a String type as a value for a property...

[joshhacksthings]

LGTM
good catch on container.py/429 --> "if val is not None"