[NX-428] Replace RepositoryComboFormField with RepositoryCombobox && filter repos based on task acceptance criterias
[NX-428] Replace RepoORGroupComboFormField with RepositoryCombobox && filter repos based on task acceptance criterias
[NX-428] Fix label/help text
[NX-428] Fix help text
[NX-428] Fix expected exception message
[NX-428] Fix IT expectation

IT should check that ID does not start with a package name
Merge pull request #542 from sonatype/NX-428-fix-task-combos

REVIEW: [NX-428] Replace legacy combo box fields in tasks