I get a stack overflow when trying to calculate downstream dependencies because of the recursion that happens in buildDependencyGraph on large instances.

This is not an easy issue to reproduce because it requires a large number of upstream and downstream jobs inside of the Jenkins instance.

It seems like a similar issue happened with the Ivy plugin here: https://issues.jenkins-ci.org/browse/JENKINS-10025

The StackOverflow looks like:

```
2017-02-22 14:45:21.410-0600 [id=133] WARNING j.u.ErrorLoggingScheduledThreadPoolExecutor#afterExecute: failure in task not wrapped in SafeTimerTask
java.lang.StackOverflowError
at nectar.plugins.rbac.groups.GroupContainerLocator$PersistenceHelper.getOrCreateGroupContainer(GroupContainerLocator.java:184)
at com.cloudbees.hudson.plugins.folder.properties.FolderProxyGroupContainer$GroupContainerLocatorImpl.get(FolderProxyGroupContainer.java:230)
at nectar.plugins.rbac.groups.GroupContainerLocator.locate(GroupContainerLocator.java:116)
at nectar.plugins.rbac.strategy.RoleMatrixAuthorizationStrategyImpl.getACL(RoleMatrixAuthorizationStrategyImpl.java:181)
at hudson.model.AbstractItem.getACL(AbstractItem.java:479)
at hudson.model.AbstractItem.hasPermission(AbstractItem.java:493)
at com.cloudbees.hudson.plugins.folder.AbstractFolder.getItem(AbstractFolder.java:1156)
at com.cloudbees.hudson.plugins.folder.AbstractFolder.getItem(AbstractFolder.java:140)
at jenkins.model.Jenkins.getItemByFullName(Jenkins.java:2506)
at jenkins.model.Jenkins.getItemByFullName(Jenkins.java:2525)
at hudson.plugins.templateproject.TemplateUtils.getProject(TemplateUtils.java:28)
at hudson.plugins.templateproject.ProxyPublisher.getProject(ProxyPublisher.java:51)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:114)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
at hudson.plugins.templateproject.ProxyPublisher.buildDependencyGraph(ProxyPublisher.java:118)
.....(It continues like that for a very long time)
```