Remove xerces:xmlParserAPIs and xml-apis dependencies

mod-login-saml has these dependencies:

• xerces:xmlParserAPIs:2.6.2 via domain-models-runtime
• xml-apis: xml-apis:1.3.04 via pac4j-saml-opensamlv3

Both libraries haven been included into JDK since Java 9.

Using any of these classes (org.w3c.dom.**) causes this compile error in Java compilers that comply with the Java specs (for example the one used by Eclipse):

The package org.w3c.dom is accessible from more than one module: <unnamed>, java.xml

Solution:

Exclude these dependencies.