harare zimbabwe name former diplomat head intelligence agency state-owned newspaper herald say saturday isaac moyo serve ambassador neighbor south africa lesotho replace retire army general happyton bonyongwe paper quote chief secretary president misheck sibanda say one immediately available comment president emmerson mnangagwa office herald mouthpiece government moyo take domestic spy network central intelligence organisation permeate every institution section society use former president robert mugabe stay power serve member african union committee intelligence security service africa cissa intelligence provider union 55 state mnangagwa swear two weeks ago wake de facto military coup end mugabe 37-year rule ring change administration include appoint lead military officials top post cabinet zimbabwe name diplomat isaac moyo top spy