Always wait for the AE2 component to finish before continuing.
Affected test cases: OneM2M_Testcases_CSE_Release_1 TC_CSE_SUB_CRE_001_SUB TC_CSE_SUB_CRE_004 TC_CSE_SUB_CRE_005 TC_CSE_SUB_UPD_001 TC_CSE_SUB_DEL_001 OneM2M_Testcases_CSE_Release_2 TC_CSE_SUB_UPD_007 TC_CSE_SUB_NTF_001 TC_CSE_SUB_NTF_002 TC_CSE_SUB_NTF_003 TC_CSE_SUB_UPD_002 TC_CSE_SUB_DEL_002 TC_CSE_SUB_DEL_003 TC_CSE_SUB_UPD_003 TC_CSE_SUB_UPD_004 TC_CSE_SUB_UPD_005 TC_CSE_SUB_UPD_008 TC_CSE_SUB_UPD_009 TC_CSE_SUB_UPD_006