Cherry-pick MR !344 to master branch
update IBackgroundCategory interface LHCBPS-1765
See merge request !344 (merged)
(cherry picked from commit 2e087778)
c500a315 update IBackgroundCategory interface LHCBPS-1765 c8b5d8bf update interface ID, dict and doxygen LHCBPS-1765 a22087a2 fix typo LHCBPS-1765 bd962ae0 fix typo LHCBPS-1765