Fix Paths and Pins

[blinkdog]

• Modifies collabssh so that it invokes sshproxy.sh without requiring that the current directory be on one's PATH.
• Adds a lower bound on the wipac-rest-tools requirement; use of ArgumentHandler requires >=1.6.0
  • Pip was choosing from the 1.5.x series, which will no longer work.

[dsschult]

It would be interesting to see the log from pip where it was choosing the 1.5.x series, and why it was doing so.

[blinkdog]

pip-install-output.txt

It's interesting because it picks 1.6.0 at first, then after requests-futures it looks for compatible (~1.5.x) versions:

Collecting requests-futures (from wipac-rest-tools->lta==0.42.0)
  Downloading requests_futures-1.0.1-py2.py3-none-any.whl.metadata (12 kB)
INFO: pip is looking at multiple versions of wipac-rest-tools to determine which version is compatible with other requirements. This could take a while.
Collecting wipac-rest-tools (from lta==0.42.0)
  Downloading wipac_rest_tools-1.5.3-py3-none-any.whl.metadata (6.1 kB)
  Downloading wipac_rest_tools-1.5.2-py3-none-any.whl.metadata (6.1 kB)