bump rhg_compute_tools to v0.1.2

[delgadom]

Workflow

• [x] Closes issue #66
• [ ] Notebook:worker pairing builds & passes local build, visual inspection & client.map tests
• [ ] Passes travis tests
• [ ] Image deployed on dev branch (see notebook and worker dev tags)
• [ ] Worker passes manual deployment test on compute.rhg
• [ ] Notebook+worker passes test-hub deployment
• [ ] Updates integrated into downstream images

Summary

Updates rhg_compute_tools to v0.1.2

[delgadom]

superceded by #68