Remove dependencies of logback in Apache Lens interpreter

mvn install -DskipTests

[INFO] — cobertura-maven-plugin:2.7:instrument (cobertura) @ zeppelin-interpreter —
[INFO] Cobertura 2.1.1 - GNU GPL License (NO WARRANTY) - See COPYRIGHT file

[ERROR] SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/suresh/.m2/repository/ch/qos/logback/logback-classic/1.0.13/logback-classic-1.0.13.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/suresh/.m2/repository/org/slf4j/slf4j-log4j12/1.7.10/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]