pom.xml: exclude more transitive dependencies from hadoop-core
pom.xml: exclude more transitive dependencies from hadoop-core

We don't need JSP dependencies from Hadoop. Same with servlet-api which
may conflict with the collector container.

Signed-off-by: Pierre-Alexandre Meyer <ff019a5748a52b5641624af88a54a2f0e46a9fb5@ning.com>

ning/collector,pierre/collector,pierre/collector,ning/collector,pierre/collector,ning/collector,ning/collector,ning/collector,pierre/collector,pierre/collector,pierre/collector