Bug 55571 .metadata folder created under install dir
In I20040322 the .metadata folder is being created in the install dir.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEApplication.java
try {
				if (instanceLoc.lock()) {
					writeWorkspaceVersion();
					return true;
				}
			} catch (IOException e) {
				
			}
			MessageDialog
					.openError(
							shell,
							IDEWorkbenchMessages
									.getString("IDEApplication.workspaceCannotBeSetTitle"), 
							IDEWorkbenchMessages
									.getString("IDEApplication.workspaceCannotBeSetMessage")); 
			return false;
		}
		
		URL defaultUrl = instanceLoc.getDefault();
		String initialDefault = defaultUrl == null ? null : defaultUrl
				.getFile();
		ChooseWorkspaceData launchData = new ChooseWorkspaceData(
				initialDefault);
		boolean force = false;
		while (true) {
			URL workspaceUrl = promptForWorkspace(shell, launchData, force);
			if (workspaceUrl == null)
				return false;