Shib IDPv3 pom.xml

[Tom Zeller]

> While attempting to build and run the IDP v3 war from scratch (in the
> idp-war directory), I found that I needed to add the two dependencies
> below to the pom.xml file to get it to run locally:
>
> <dependency>
>     <groupId>org.slf4j</groupId>
>     <artifactId>jcl-over-slf4j</artifactId>
>     <version>1.7.12</version>
> </dependency>
>
> <dependency>
>     <groupId>ch.qos.logback</groupId>
>     <artifactId>logback-classic</artifactId>
>     <version>1.1.2</version>
> </dependency>

For background, see : https://issues.shibboleth.net/jira/browse/JPAR-57