Add a new Web rule to prevent use of SQL inside JSP

There is already a check for IllegalTagLibsCheck, so it is already posssible to scan for illegal use of the jstl sql taglib.

A new check is provided: LibraryDependencyCheck.

LibraryDependencyCheck has a param for the list of libraries that should not be used. This param has a default value of java.sql,javax.sql. Dependencies to these lirabries should be avoided.

The check will scan for two things:

• page import
  e.g. <%@ page import=\"java.sql.*\"%>
• expressions
  e.g. <% java.sql.Connection c1; %>