Zabbix

.......... [DEV-1901] added calculated items formula validation tests

Merge in ZBX/zabbix from feature/DEV-1901-5.4 to release/5.4

* commit 'c8ed80ad82893a870d6f736cabdcfa5f3da66b42':
  .......... [DEV-1901] brackets micro fix
  .......... [DEV-1901] data provider micro fix
  .......... [DEV-1901] added special cases for fuzzytime and nodata function, added checks for quotted parameters
  .......... [DEV-1901] fixed cases for macros in item and item prototypes validation
  .......... [DEV-1901] extracted common code, added check for item prototype
  .......... [DEV-1901] added value shift test cases
  .......... [DEV-1901] added test cases with capital letters in functions
  .......... [DEV-1901] added nested function test cases
  .......... [DEV-1901] added incomplete time shift test cases
  .......... [DEV-1901] added macros to test cases
  .......... [DEV-1901] added some more validation cases
  .......... [DEV-1901] axis test investigation
  .......... [DEV-1901] axis test investigation
  .......... [DEV-1901] axis test investigation
  .......... [DEV-1901] axis test investigation
  .......... [DEV-1901] added test for formula validation in calculated items