Tailor javadoc parameters for Java 7

Unfortunately, java 8 requires the --allow-script-in-comments for
javadocs, while java 7 prohibits it. I'm now assuming the 4.2 branch
will be built on java 7 and commenting out the param.

pom.xml

@@ -212,12 +212,14 @@
 					<version>2.10.3</version>
 					<configuration>
 						<!-- we need to allow script in comments or otherwise we can't use google analytics js in footer below - JD 2017-06-06 -->
-						<additionalparam>--allow-script-in-comments</additionalparam>
+						<!-- requires java 8u121
+						<additionalparam>--><!--allow-script-in-comments</additionalparam>
 						<maxmemory>256m</maxmemory>
 						<footer>&lt;script src="http://www.google-analytics.com/urchin.js"
 							type="text/javascript"&gt;&lt;/script&gt;&lt;script
 							type="text/javascript"&gt;_uacct =
 							"UA-1326640-1";urchinTracker();&lt;/script&gt;</footer>
+						-->
 					</configuration>
 
 				</plugin>