Puts a better comment in templates/web.xml
Remove useless and confusing websiteId in web.xml files

I did not remove some others, but I believe they don't make sense as they are.
Take for instance those data
<WebSite webSiteId="EBAY_STORE1" siteName="eBay Store1" standardContentPrefix="http://demo.ofbiz.org" productStoreId="90101"/>
<WebSite webSiteId="EBAY_STORE2" siteName="eBay Store2" standardContentPrefix="http://demo.ofbiz.org" productStoreId="90102"/>
<WebSite webSiteId="GOOGLEBASE" standardContentPrefix="http://demo.ofbiz.org" productStoreId="9000" />

Sorry but http://demo.ofbiz.org/ leads nowhere!

And do we need to keep those referring to productStoreId="9000" in web.xml files? They have not their own webapps
<WebSite webSiteId="CmsSite" siteName="CMS Web Site"/>
<WebSite webSiteId="OfbizSite" siteName="OFBiz Web Site"/>
<WebSite webSiteId="GOOGLECHECKOUT" productStoreId="9000" />
<WebSite webSiteId="GOOGLECHECKOUT" productStoreId="9000" />

I think we should keep in web.xml files, only ecommerce/clone and webPos (uses POS store)

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1526686 13f79535-47bb-0310-9956-ffa450edef68