FIX: Python 3.4 is not compatible with the recent release of lxml-4.4.0

[oesteban]

We are starting to see failed jobs in Travis.

Summary

Fixes # .

List of changes proposed in this PR (pull-request)

Acknowledgment

• (Mandatory) I acknowledge that this contribution will be available under the Apache 2 license.

[effigies]

If it passes, cool.

We should also probably drop 3.4 support soon, anyway.

[effigies]

The cancelled test was me, because we don't need to double-up our Travis builds when the queue is slammed.

[oesteban]

It's not passing. Is there a way to create requirements.txt filtering versions?

[codecov]

Codecov Report

Merging #2980 into master will increase coverage by 0.53%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2980      +/-   ##
==========================================
+ Coverage   67.08%   67.61%   +0.53%     
==========================================
  Files         343      344       +1     
  Lines       43767    43785      +18     
  Branches     5466     5469       +3     
==========================================
+ Hits        29361    29607     +246     
+ Misses      13687    13467     -220     
+ Partials      719      711       -8

Flag	Coverage Δ
#smoketests	50.39% <ø> (ø)	⬆️
#unittests	65.04% <ø> (+0.79%)	⬆️

Impacted Files	Coverage Δ
nipype/info.py	94.11% <ø> (ø)	⬆️
nipype/testing/__init__.py	88.88% <0%> (ø)
nipype/interfaces/spm/preprocess.py	57.03% <0%> (+0.32%)	⬆️
nipype/utils/filemanip.py	80.08% <0%> (+0.4%)	⬆️
nipype/interfaces/freesurfer/preprocess.py	66.11% <0%> (+0.98%)	⬆️
nipype/interfaces/freesurfer/model.py	64.25% <0%> (+1.12%)	⬆️
nipype/interfaces/io.py	54.94% <0%> (+1.88%)	⬆️
nipype/interfaces/spm/base.py	87.08% <0%> (+1.98%)	⬆️
nipype/interfaces/freesurfer/utils.py	62.94% <0%> (+2.13%)	⬆️
nipype/workflows/smri/freesurfer/autorecon1.py	46.75% <0%> (+5.09%)	⬆️
... and 8 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #2980 into master will increase coverage by 0.53%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2980      +/-   ##
==========================================
+ Coverage   67.08%   67.61%   +0.53%     
==========================================
  Files         343      344       +1     
  Lines       43767    43785      +18     
  Branches     5466     5469       +3     
==========================================
+ Hits        29361    29607     +246     
+ Misses      13687    13467     -220     
+ Partials      719      711       -8

Flag	Coverage Δ
#smoketests	50.39% <ø> (ø)	⬆️
#unittests	65.04% <ø> (+0.79%)	⬆️

Impacted Files	Coverage Δ
nipype/info.py	94.11% <ø> (ø)	⬆️
nipype/testing/__init__.py	88.88% <0%> (ø)
nipype/interfaces/spm/preprocess.py	57.03% <0%> (+0.32%)	⬆️
nipype/utils/filemanip.py	80.08% <0%> (+0.4%)	⬆️
nipype/interfaces/freesurfer/preprocess.py	66.11% <0%> (+0.98%)	⬆️
nipype/interfaces/freesurfer/model.py	64.25% <0%> (+1.12%)	⬆️
nipype/interfaces/io.py	54.94% <0%> (+1.88%)	⬆️
nipype/interfaces/spm/base.py	87.08% <0%> (+1.98%)	⬆️
nipype/interfaces/freesurfer/utils.py	62.94% <0%> (+2.13%)	⬆️
nipype/workflows/smri/freesurfer/autorecon1.py	46.75% <0%> (+5.09%)	⬆️
... and 8 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6f2f94f...39522fc. Read the comment docs.

[oesteban]

Travis worked on my branch. Merging in.