By Cris Chinaka HARARE (Reuters) – Zimbabwe’s ruling ZANU-PF party suspended several senior officials aligned to Vice-President Joice Mujuru on Friday, weakening her position in an fierce battle to succeed ageing President Robert Mugabe. A ZANU-PF politburo meeting, chaired by Mugabe, suspended National party spokesman Rugare Gumbo, expelled war veterans leader Jabulani Sibanda and endorsed the suspension of half the party’s provincial chairmen, citing “disciplinary issues”. …