[PDI-6532] junit test for parsing mail functionality
[PDI-6532] Fix for not-existing Header provided
[PDI-7241] removed option 'retrive unread' from transformation step
dialog and job entry dialog. Added handling for backward compatibility
with ktr/kjb created in previous versions.
Fix integration test suite compilation error
Merge pull request #132 from pavel-sakun/fix_integration_tests

Fix integration test suite compilation error
Merge pull request #103 from prakapenka/PDI-6532

[PDI-6532] The EMail Messages Input step is throwing an exception during preview when "Mail Header(Name)" is included in the "Fields" list
Merge pull request #104 from prakapenka/PDI-7241

[PDI-7241] Unable to retrieve Unread E-mails when using Email Message Input step.
[PDI-6932] - provide comparator to sort by date (not string)

add comparatorBinding to xul markup
implement simple comparator for UIRepositoryObject
add unit test for comparator
after several attempts gave up idea tyo implement Xul UI unit test
simulating the entire (mis)behavior:
to many issues with Xul SWT implemantation
[PDI-6932] - code cleanup: remove commented out method
[PDI-6932] - reflect pull request comments

remove static initializer (use inline)
replace dummy interface by mockito mock object in test