Added logging to cache for video endpoint (prebid#1220)

* WIP added logging to cache for video endpoint

* Updating cache call to use TTL from config

* Updates from initial feedback
* Log now includes HTTP headers
* Fixed caching to use a new cache entry rather than appending to the
VAST
* Added feature where is query is set, the test flag is set in the
request

* Updated recorded response and handleError

* Updates from code review comments

* Changed recorded output to be only the debug ext
* Removed extra marhal calls
* Changed cache to be an endpoint dependency
* Added debugLog struct to hold all debug related info
* Numerous smaller changes

* Further code cleanup and added unit tests for debug changes

* Added missing error checks

* Added unit test for error case

If Device.UA is not present in request body, init it with user-agent …

…from header (prebid#1219)

* If Device.UA is not present in request body, init it with user-agent from request header if it's present

* Moved User-Agent handler to parseVideoRequest func and added unit test

* Minor clean up

Co-authored-by: Veronika Solovei <[email protected]>

add ucfunnel adapter (prebid#1192)

VIS.X: added app type support (prebid#1194)

Adding bid rejection messages to debug response (prebid#1181)

Enhance Message For Cache Errors (prebid#1175)

Added new adapter for CPMStar ad network banners and video (prebid#1159)

Fixes audienceNetwork adapter ignoring banner.format sizes. (prebid#1164

)

enforce video.size_id for video imps in rubicon adapter (prebid#1101)

CCPA User Sync Updates (prebid#1153)