Implement the first couple obmd-related api calls.

[zenhack]

Just enabling/disabling the obm.

[zenhack]

Re: ci/cli I just spaced; I'll add that.

[zenhack]

@naved001, all set.

[coveralls]

Pull Request Test Coverage Report for Build 1913

• 21 of 36 (58.33%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.03%) to 55.197%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
hil/api.py	8	9	88.89%
hil/cli/node.py	0	5	0.0%
hil/model.py	7	16	43.75%
<!--	Total:	21	36	58.33%	-->

Files with Coverage Reduction	New Missed Lines	%
hil/cli/node.py	1	0.0%
<!--	Total:	1		-->

Totals
Change from base Build 1912:	0.03%
Covered Lines:	2140
Relevant Lines:	3877

---

💛 - Coveralls

[ianballou]

I will have time to review this tomorrow.