* [Build] Preserve comments instead of adding header
...to avoid disrupting sourcemaps. Fixes#1707
[Build] Remove extraneous horizontal rule from header
[Build] Remove obsolete header-handling
...as this is handled by the replace task after fix for #1707
[Build] Move version headers into start.frag
...so that UMD boilerplate does not wrap it.
[Build] Handle version info entirely in start.frag
[Build] Replace build variables in start.frag explicitly
[Build] Inject build info dynamically
[Build] Test MCT.specifyBuildInfo
[Build] Mark BUILD_CONSTANTS as global for jshint
[Build] Give names to version line items
[Build] Fix specifyBuildInfo test case
* [Build] Update fix to sourcemaps for code review feedback
https://github.com/nasa/openmct/pull/1708
[Build] Move build info registration to plugin
https://github.com/nasa/openmct/pull/1708#discussion_r138999027
[Build] Use build info plugin
...instead of specifyBuildInfo
[Build] Revert changes to MCT, per code review
