2.8.2-rc1

Bug Fixes:

• MTSDK-480 After sending attachment it is also added to the next message.
• MTSDK-479_After_recovering_from_State.Error_unable_to_detach_attachment
• MTSDK-553 Text file upload failure
• MTSDK-541_no_feedback_when_detach_is_called_with_an_invalid_id

Test:

• Add/Update unit tests.
• MTSDk-542_Package_directive_does_not_match_the_file_location
• MTSDK-422_expand_stepup_automation_tests

Full Changelog: v2.8.1...v2.8.2-rc1