allow get_sane_name check for process/service ID to be shorter to accommodate existing WPS servers

[fmigneault]

Fixes

• Fix get_sane_name checks performed on Process ID and Service name to use min_len=1 in order to allow
  valid WPS process definition on existing servers to resolve references that are shorter than the previous default
  of 3 characters.

[codecov]

Codecov Report

Merging #559 (7895a8d) into master (dd99a64) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #559   +/-   ##
=======================================
  Coverage   84.43%   84.43%           
=======================================
  Files          79       79           
  Lines       17641    17642    +1     
  Branches     2675     2675           
=======================================
+ Hits        14895    14896    +1     
  Misses       2019     2019           
  Partials      727      727           

Files Changed	Coverage Δ
weaver/processes/utils.py	79.77% <100.00%> (ø)
weaver/processes/wps_package.py	84.05% <100.00%> (ø)
weaver/store/mongodb.py	78.38% <100.00%> (+0.03%)	⬆️