Ensure we use proper build order in waitForProjects()

Author: briandealwis

plugins/com.google.cloud.tools.eclipse.test.util/src/com/google/cloud/tools/eclipse/test/util/project/ProjectUtils.java

@@ -45,6 +45,7 @@
 import org.eclipse.core.resources.IProjectDescription;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspace;
+import org.eclipse.core.resources.IWorkspace.ProjectOrder;
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.IncrementalProjectBuilder;
 import org.eclipse.core.resources.ResourcesPlugin;
@@ -269,7 +270,8 @@ public static void waitForProjects(Runnable delayTactic, IProject... projects) {
       Collection<Job> jobs = Collections.emptyList();
       Set<String> previousBuildErrors = Collections.emptySet();
       boolean buildErrorsChanging;
-      for (IProject project : projects) {
+      ProjectOrder ordering = ResourcesPlugin.getWorkspace().computeProjectOrder(projects);
+      for (IProject project : ordering.projects) {
         try {
           project.build(IncrementalProjectBuilder.INCREMENTAL_BUILD, null);
         } catch (Exception ex) {