FECRU Developer Mode Plugin causes NPE when viewing a review

This is caused by a null 'completeKey' being passed from the web item to the escapeForJQuery method in ExpressionUtil.java

A null check is needed in escapeAsJQuery as is performed in the other escape methods in that class.

• https://fisheye.dev.internal.atlassian.com/browse/FE-hg/src/java/com/atlassian/fisheye/plugin/web/FisheyeWebInterfaceManager.java?r=HEAD#to172
• https://fisheye.dev.internal.atlassian.com/browse/FE-hg/src/java/com/cenqua/fisheye/web/tags/ExpressionUtil.java?r=HEAD#to326