o.c.opibuilder: Delete body.html that's in o.c.opibuilder.rap

.. and only used for RAP
Webopi: Fix issue with Firefox 29 and newer

Would be fixed in RAP 2.3, but that's not out, so using the fix
described on
https://wiki.eclipse.org/RAP/FAQ#Blank_page_or_client_crash_in_Firefox_29.2B
RAP DataBrowser: Allow use with Firefox version 29+
webopi.warproduct: Remove databrowser2.rap plugin

When included, its RedirectServlet would route all requests to "/d", the
tandalone databrowser. "/w", "/m" for *.opi access was no longer
possible. Without the databrowser2.rap plugin, the webopi.war starts as
a WebOPI for *.opi files, but still includes the "New Data Browser Plot"
button in the toolbar.
Merge pull request #543 from ControlSystemStudio/bug541

Bug541