Python2 Package Updates/Changes

[ilan-gold]

1. Python3 uses a different hashing method than Python2 altogether so I decided to get rid of the hash function altogether and use a reliable library
2. Remove librabbitmq (which is Python2 only) and rely solely on ampq
3. Add testing of the pysam module in advance of its upgrade in Python3

[codecov]

Codecov Report

Merging #3464 into develop will decrease coverage by 0.03%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #3464      +/-   ##
===========================================
- Coverage    87.45%   87.41%   -0.04%     
===========================================
  Files           97       96       -1     
  Lines        14874    14800      -74     
===========================================
- Hits         13008    12938      -70     
+ Misses        1866     1862       -4

Impacted Files	Coverage Δ
refinery/file_store/utils.py	68.93% <100%> (-1.97%)	⬇️
refinery/file_store/test_utils.py	100% <100%> (ø)	⬆️
refinery/data_set_manager/tasks.py	54.49% <0%> (-3%)	⬇️
refinery/core/views.py	68.75% <0%> (-0.5%)	⬇️
refinery/data_set_manager/utils.py	81.71% <0%> (-0.15%)	⬇️
refinery/core/models.py	82.47% <0%> (ø)	⬆️
refinery/data_set_manager/test_tasks.py

---

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 bf46b82...8579a49. Read the comment docs.

[hackdna]

refinery/data_set_manager/test-data/test.bam is no longer needed