Lps 36203 weblogic web content

Hi Igor!

Seems we knew how to fix this issue (https://issues.liferay.com/browse/LPP-6121?focusedCommentId=273591&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-273591) but we didn't create a patch nor update weblogic.xml accordingly.

It was an issue with woodstock libraries, that are already bundled in weblogic, so the solution was to use Liferay ones.

Seems better solution than <prefer-web-inf-classes>true</prefer-web-inf-classes> because it avoids another unexpected errors (and probably that's why that didn't go into sources).

Thanks!