Address issue in which _maxSize property was not updated for single series histogram. Fix #1475
Update series-histogram unit tests.
Charts HISTORY update.
Merge branch 'issue1475' into release-3.14.1
Update build files for charts histogram.
	modified:   ../build/series-histogram-base/series-histogram-base-coverage.js
	modified:   ../build/series-histogram-base/series-histogram-base-debug.js
	modified:   ../build/series-histogram-base/series-histogram-base-min.js
	modified:   ../build/series-histogram-base/series-histogram-base.js