remove modelValidator test class
comment unused code block
use multiload parameter to load meta attributes
refactor exception handling in metadata setup
remove event loader test class
fix error in test classes
reorganize static string variables in Constants class
add alternative date format to support
remove static string variables that are moved to Constants class
remove unused methods
add arrays of date formats and possible values
apply constant variable name change
Merge commit '2f2b52572bce3bdd3f38cf1bf023b2e540e55ba3'