Stop downloading help from Confluence on CI

[bajtos]

• Stop downloading help contents from Confluence on CI to prevent intermittent network-related errors
• Also stop jshint-ing "gulpfile.js" as it has several lines that are too long.

@jtary please review

[bajtos]

strong-arc/label=amazon-4 — Build #4293 (master) failed

> strong-mesh-client@1.6.3 install /mnt/jenkins/workspace/strong-arc/3c21596a/node_modules/strong-mesh-client
> node proxy/build-client.js

module.js:327
    throw err;
    ^

Error: Cannot find module 'lodash/_MapCache'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/mnt/jenkins/workspace/strong-arc/3c21596a/node_modules/loopback-boot/node_modules/strong-globalize/lib/globalize.js:14:16)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)

This is a known issue not related to my changes, see https://github.com/strongloop/strong-mesh-client/issues/50

[bajtos]

@slnode test please

[jtary]

LGTM