Corrected PMD errors
Merge pull request #365 from kazoompa/pmd-corrections

Corrected PMD errors
OPAL-2144 Functional units removed from import/export services and replaced by the identifiers mapping concept
Fixed some PMD warnings
Merge pull request #366 from emorency/master

Fixed some PMD warnings
Fixed test
Merge pull request #367 from emorency/master

Fixed test
OPAL-2144 Removed some functional unit dependencies
PMD fixes
FunctionalUnitService removed
Some Functional unit related classes refactored.
Functional unit dependencies removed
Set the permissions related to the project's transient datasources
PMD fixes
Fix Code Size PMD warnings
Fix Code Size PMD warnings
Fix plural form
Fix not null but empty certificate