Change Eclipse Settings to allow forbidden references

Spring uses lots of forbidden references. The current Eclipse settings
set forbiddenReference=error This was not ideal because there were lots of
errors in the workspace.

This commit changes forbiddenReference=warning since we nee to allow
forbidden references.

src/eclipse/org.eclipse.jdt.core.prefs

@@ -42,7 +42,7 @@ org.eclipse.jdt.core.compiler.problem.fatalOptionalError=disabled
 org.eclipse.jdt.core.compiler.problem.fieldHiding=ignore
 org.eclipse.jdt.core.compiler.problem.finalParameterBound=warning
 org.eclipse.jdt.core.compiler.problem.finallyBlockNotCompletingNormally=warning
-org.eclipse.jdt.core.compiler.problem.forbiddenReference=error
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.problem.hiddenCatchBlock=warning
 org.eclipse.jdt.core.compiler.problem.includeNullInfoFromAsserts=disabled
 org.eclipse.jdt.core.compiler.problem.incompatibleNonInheritedInterfaceMethod=warning