include VaadinCommonMessages.properties in list of properties files accessible by messageSource bean.

GCP-10121

Reviewer: Darla Ani
Use DateUtil methods for getting the IBPDate format of the date parameter for search

GCP-10121

Reviewer: Darla Ani-Hermo
Remove the Date related messages and enum since these are now in VaadinMessages in IBPCommons

GCP-10121

Reviewer: Darla Ani-Hermo
Remove all date-related methods of Util class since these are now all in DateUtil class in IBPCommons

GCP-10121

Reviewer: Darla Ani-Hermo
Delete InvalidDateException class since this is now in IBPCommons

GCP-10121

Reviewer: Darla Ani-Hermo