Fixed hist outputs to N/A when all DNs are special pixels#4412

Merged

acpaquette merged 4 commits intoDOI-USGS:devfrom amystamile-usgs:histBadStats

Apr 23, 2021

+733-277

Commits on Apr 19, 2021

Updated bad stats to NA.
Amy Stamile
committed

Commits on Apr 20, 2021

Added gtests and removed old makefile tests.
Amy Stamile
committed
Updated changelog.
Amy Stamile
committed

Commits on Apr 22, 2021

Addressed PR feedback
Amy Stamile
committed