Nigeria's President Goodluck Jonathan arrives for the extraordinary session of the African Union's Assembly of Heads of State and Government on the case of African Relationship with the International Criminal Court (ICC), in Ethiopia's capital Addis Ababa, in this October 12, 2013 file photo. Jonathan replaced his entire military leadership without explanation on January 16, 2014, as he struggles with an Islamist insurgency and political crisis within his ruling party. The presidency announced the removal of the chiefs of defence, army, navy and air force and named their successors. It gave no reason but the military has suffered a series of setbacks recently in fighting the Boko Haram sect which is trying to create an Islamic state in northern Nigeria. REUTERS/Tiksa Negeri/Files (ETHIOPIA - Tags: POLITICS LAW MILITARY) Former President Goodluck Jonathan is yet to respond to an invitation by the House of Representatives, over the controversial $1.1bn Malabu oil deal. An a...