Provide a standard XML catalog

[perry2of5]

When WTP is not installed, and a firewall denies requests to remote xsd files, WildWebDeveloper can't resolve j2ee xsd's. Please include j2ee xsd's in lemminx.

Spring Tool Suite dropped WTP from the distribution. Now, when at work, normal J2EE XML files fail to validate. For example, this won't validate at work from behind a firewall without WTP:

<?xml version="1.0"?>
<web-app version="4.0"
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		xmlns="http://xmlns.jcp.org/xml/ns/javaee"
		xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd">

See wildwebdeveloper issue 778 for listings showing the difference in the number of xsd's in the catalog with and without WTP installed. https://github.com/eclipse/wildwebdeveloper/issues/778