Add debugging information to UpgradeChecker
merge dev_5_0 -D org -I include -E exclude: PR 915 (Fix for single channel  meas_mode 13 data.)
merge dev_5_0 -D org -I include -E exclude: PR 941 (Fix the download URL for stable release jars)
merge dev_5_0 -D org -I include -E exclude: PR 943 (Log the expected and actual values in failed metadata tests)
merge dev_5_0 -D org -I include -E exclude: PR 946 (Read internal pyramids from CellSens .vsi data)