Merge pull request #364 from eclipse/github_che_362_fix

CHE-362: fix ignoring custom port of Che by ws agent

assembly/assembly-ide-war/src/main/webapp/WEB-INF/classes/codenvy/che.properties

@@ -109,7 +109,7 @@ machine.docker.machine_extra_hosts=NULL
 # This is the API endpoint of the workspace master running within the core Che server.
 # This tells the workspace agent how to connect back to the Che server.
 # che-host is a fake DNS hostname that Che creates for itself.
-machine.docker.che_api.endpoint=http://che-host:8080/ide/api
+machine.docker.che_api.endpoint=http://che-host:${SERVER_PORT}/ide/api
 
 # If this is true, then we always pull an image from a registry even if we have an image cached
 # locally. If false, Docker only pulls image if it does not exist locally.