To build jbosstools-openshift-4.4.3 I followed following steps
1. I clone jbosstools-base and jbosstools-server which are required for the building jbosstools-openshift-4.4.3.
2. while executing the jbosstools-base I got error "Missing requirement: org.jboss.tools.common.core 3.8.3.qualifier requires 'bundle org.jboss.tools.foundation.core 1.3.3' but it could not be found".
3. I build the org.jboss.tools.foundation.core 1.3.3 plugin and add into eclipse plugin folder and restart the eclipse IDE still facing the isuue.