Add CCPA / US privacy data support for LockerDome adapter

[margsliu]

Type of change

• Bugfix
• Feature
• New bidder adapter
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Does this change affect user-facing APIs or examples documented on http://prebid.org?
• Other

Description of change

These changes add CCPA / US privacy data support for the LockerDome adapter
Related docs PR: prebid/prebid.github.io#1669

gulp test results:

[10:04:45] Starting 'test'...
[10:04:45] Starting 'clean'...
[10:04:45] Finished 'clean' after 12 ms
[10:04:45] Starting 'lint'...
[10:05:03] Finished 'lint' after 18 s
[10:05:03] Starting 'test'...
START:
ℹ ｢wdm｣: 
ℹ ｢wdm｣: Compiled successfully.
ℹ ｢wdm｣: Compiling...
ℹ ｢wdm｣: 
ℹ ｢wdm｣: Compiled successfully.
11 12 2019 10:05:32.268:INFO [karma-server]: Karma v3.1.4 server started at http://0.0.0.0:9876/
11 12 2019 10:05:32.270:INFO [launcher]: Launching browsers ChromeHeadless with concurrency unlimited
11 12 2019 10:05:32.278:INFO [launcher]: Starting browser ChromeHeadless
11 12 2019 10:05:32.792:INFO [HeadlessChrome 78.0.3904 (Linux 0.0.0)]: Connected on socket S3C4Dmy5Dbq5q5mtAAAA with id 37132732
11 12 2019 10:05:34.068:WARN [web-server]: 404: /vuble_renderer.js
11 12 2019 10:05:36.017:WARN [web-server]: 404: /nurl&s=0.66
11 12 2019 10:05:36.017:WARN [web-server]: 404: /burl&s=0.66
11 12 2019 10:05:36.537:WARN [web-server]: 404: /scriptUrl.com
LOG: 'entrance', '5:36'
Finished in 5.522 secs / 2.888 secs @ 10:05:39 GMT-0600 (Central Standard Time)
SUMMARY:
✔ 4898 tests completed
ℹ 2 tests skipped
[10:05:39] Finished 'test' after 36 s
[10:05:39] Finished 'test' after 54 s```

[jsnellbaker]

LGTM

[margsliu]

@jsnellbaker Hey, thanks! I also updated our wiki entry here.