BB-18579: PHP 7.3 compatibility (#26205)
BB-18579: PHP 7.3 compatibility (#26205)

- fixed regular expressions
- fixed routes
- upgraded elasticsearch/elasticsearch
- upgraded "friendsofphp/php-cs-fixer" to version 2.12.12
- changed php version in CI builds
- fixed regexp in behat contexts
orocrm/OroCalendarBundle,orocrm/OroCalendarBundle,orocrm/OroCalendarBundle