Add AssertJ to Eclipse Oomph Setup

eclipse/spring-boot-project.setup

@@ -198,7 +198,7 @@
     <setupTask
         xsi:type="setup:PreferenceTask"
         key="/instance/org.eclipse.jdt.ui/content_assist_favorite_static_members"
-        value="org.hamcrest.Matchers.*;org.junit.Assert.*;org.mockito.BDDMockito.*;org.mockito.Matchers.*;org.mockito.Mockito.*;org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;org.springframework.test.web.servlet.result.MockMvcResultMatchers.*"/>
+        value="org.assertj.core.api.Assertions.*;org.hamcrest.Matchers.*;org.junit.Assert.*;org.mockito.BDDMockito.*;org.mockito.Matchers.*;org.mockito.Mockito.*;org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;org.springframework.test.web.servlet.result.MockMvcResultMatchers.*"/>
     <setupTask
         xsi:type="setup:PreferenceTask"
         key="/instance/org.eclipse.jdt.ui/smart_backspace"