updated switch discovery to update lookups

[SisterMystery]

for https://github.com/RackHD/RackHD/issues/236
@RackHD/corecommitters @johren
adds a task to the switch discovery workflow to add all of the switch's interface mac addresses to the lookups collection

depends on RackHD/on-tasks#219

[coveralls]

Coverage remained the same at 92.224% when pulling cdba754 on VulpesArtificem:snmp-lookups into 180b22d on RackHD:master.

[benbp]

👍

[yyscamper]

👍

[benbp]

test this please

[JenkinsRHD]

*** BUILD #661 ***

[benbp]

test this please

[JenkinsRHD]

*** BUILD #673 ***
Test Name: Graph Library should validate all existing graphs not requiring user input for null values
Error Details: required option obmServiceName for task Task.Obm.Node.PxeBoot in graph Graph.BootLiveCD
Stack Trace: AssertionError: required option obmServiceName for task Task.Obm.Node.PxeBoot in graph Graph.BootLiveCD
    at AssertService.(anonymous function) [as ok] (node_modules/on-core/lib/common/assert.js:30:28)
    at node_modules/on-core/lib/workflow/task-graph.js:336:20
    at arrayEach (node_modules/lodash/index.js:1289:13)
    at Function.<anonymous> (node_modules/lodash/index.js:3345:13)
    at TaskGraph._validateOptions (node_modules/on-core/lib/workflow/task-graph.js:328:11)
    at node_modules/on-core/lib/workflow/task-graph.js:274:26
    at arrayEach (node_modules/lodash/index.js:1289:13)
    at Function.<anonymous> (node_modules/lodash/index.js:3345:13)
    at node_modules/on-core/lib/workflow/task-graph.js:271:19
    at tryCatcher (node_modules/on-core/node_modules/bluebird/js/main/util.js:26:23)
    at Promise._settlePromiseFromHandler (node_modules/on-core/node_modules/bluebird/js/main/promise.js:507:31)
    at Promise._settlePromiseAt (node_modules/on-core/node_modules/bluebird/js/main/promise.js:581:18)
    at Promise._settlePromises (node_modules/on-core/node_modules/bluebird/js/main/promise.js:697:14)
    at Async._drainQueue (node_modules/on-core/node_modules/bluebird/js/main/async.js:123:16)
    at Async._drainQueues (node_modules/on-core/node_modules/bluebird/js/main/async.js:133:10)
    at Async.drainQueues (node_modules/on-core/node_modules/bluebird/js/main/async.js:15:14)

[yyscamper]

Jenkins: test this please