Merge pull request #447 from AnnaStorozhenko/development

To issue #265 Integration tests for VU, finished
Issue #448 fixed.
Merge pull request #449 from nazariitashak/test

Issue #448 fixed.
Merge pull request #450 from EricpolUkraine/test

Quick fix 1.15.2.1
Integration test for BDM were added
Merge remote-tracking branch 'upstream/development' into development
VU Page tests updated after merge