fix meshing in conda environments and renable tests

[cekees]

Mandatory Checklist

Please ensure that the following criteria are met:

• [x] Title of pull request describes the changes/features
• [x] Request at least 2 reviewers
• [x] If new files are being added, the files are no larger than 100kB. Post the file sizes.
• [x] Code coverage did not decrease. If this is a bug fix, a test should cover that bug fix. If a new feature is added, a test should be made to cover that feature.
• [x] New features have appropriate documentation strings (readable by sphinx)
• [x] Contributor has read and agreed with CONTRIBUTING.md and has added themselves to CONTRIBUTORS.md

As a general rule of thumb, try to follow PEP8 guidelines.

Description

[codecov[bot]]

Codecov Report

Merging #1231 into master will increase coverage by 0.44%. The diff coverage is 62.50%.

@@            Coverage Diff             @@
##           master    #1231      +/-   ##
==========================================
+ Coverage   52.29%   52.74%   +0.44%     
==========================================
  Files         531      531              
  Lines      109524   109533       +9     
==========================================
+ Hits        57277    57774     +497     
+ Misses      52247    51759     -488     

Impacted Files	Coverage Δ
proteus/LinearSolvers.py	57.83% <ø> (+0.08%)	:arrow_up:
proteus/NumericalSolution.py	70.73% <45.45%> (-0.26%)	:arrow_down:
proteus/TwoPhaseFlow/utils/Parameters.py	89.80% <100.00%> (-0.02%)	:arrow_down:
proteus/tests/test_boundaryconditions.py	97.21% <0.00%> (-0.37%)	:arrow_down:
proteus/MeshTools.py	55.71% <0.00%> (+0.02%)	:arrow_up:
proteus/mprans/MoveMesh.py	86.56% <0.00%> (+0.17%)	:arrow_up:
proteus/Gauges.py	93.58% <0.00%> (+0.23%)	:arrow_up:
proteus/mprans/Dissipation.py	77.70% <0.00%> (+0.73%)	:arrow_up:
proteus/mprans/Kappa.py	77.26% <0.00%> (+0.74%)	:arrow_up:
... and 3 more

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[ejtovar]

Seems like everything is good to go now that the tests are passing!