Error log:

Problems occurred while performing installation: The following connectors are not available: Mylyn Issue Tracker Connectors (id=org.jboss.tools.common.mylyn.feature.feature.group, org.eclipse.mylyn_feature.feature.group, org.eclipse.mylyn.ide_feature.feature.group, org.eclipse.mylyn.commons.feature.group, org.eclipse.mylyn.context_feature.feature.group, org.eclipse.mylyn.bugzilla_feature.feature.group, org.eclipse.mylyn.java_feature.feature.group, org.eclipse.mylyn.pde_feature.feature.group, org.eclipse.mylyn.team_feature.feature.group, org.eclipse.mylyn.versions.feature.group, site=https://devstudio.jboss.com/updates/7.0-development/central/core/)
The following connectors are not available: Mylyn Issue Tracker Connectors (id=org.jboss.tools.common.mylyn.feature.feature.group, org.eclipse.mylyn_feature.feature.group, org.eclipse.mylyn.ide_feature.feature.group, org.eclipse.mylyn.commons.feature.group, org.eclipse.mylyn.context_feature.feature.group, org.eclipse.mylyn.bugzilla_feature.feature.group, org.eclipse.mylyn.java_feature.feature.group, org.eclipse.mylyn.pde_feature.feature.group, org.eclipse.mylyn.team_feature.feature.group, org.eclipse.mylyn.versions.feature.group, site=https://devstudio.jboss.com/updates/7.0-development/central/core/)