periodic maintenance: Upgrade dependencies to newer versions

mvn versions:display-dependency-updates

[INFO] --- versions-maven-plugin:2.2:display-dependency-updates (default-cli) @ nifi-example-nar ---
[INFO] The following dependencies in Dependency Management have newer versions:
[INFO]   com.google.guava:guava .............................. 18.0 -> 19.0-rc1
[INFO]   com.h2database:h2 ................................. 1.3.176 -> 1.4.188
[INFO]   com.jcraft:jsch ..................................... 0.1.52 -> 0.1.53
[INFO]   com.yammer.metrics:metrics-core ................. 2.2.0 -> 3.0.0-BETA1
[INFO]   com.yammer.metrics:metrics-ganglia .............. 2.2.0 -> 3.0.0-BETA1
[INFO]   javax.el:javax.el-api ............................. 3.0.0 -> 3.0.1-b04
[INFO]   javax.mail:mail ................................... 1.4.7 -> 1.5.0-b01
[INFO]   javax.servlet.jsp:javax.servlet.jsp-api ........... 2.3.1 -> 2.3.2-b01
[INFO]   joda-time:joda-time ..................................... 2.8 -> 2.8.2
[INFO]   net.sf.saxon:Saxon-HE ............................. 9.6.0-5 -> 9.6.0-7
[INFO]   org.apache.activemq:activemq-client ................. 5.11.1 -> 5.12.0
[INFO]   org.apache.commons:commons-compress ...................... 1.9 -> 1.10
[INFO]   org.apache.commons:commons-pool2 ...................... 2.4.1 -> 2.4.2
[INFO]   org.apache.hadoop:hadoop-annotations .................. 2.6.0 -> 2.7.1
[INFO]   org.apache.hadoop:hadoop-client ....................... 2.6.0 -> 2.7.1
[INFO]   org.apache.hadoop:hadoop-common ....................... 2.6.0 -> 2.7.1
[INFO]   org.apache.hadoop:hadoop-hdfs ......................... 2.6.0 -> 2.7.1
[INFO]   org.apache.hadoop:hadoop-mapreduce-client-core ........ 2.6.0 -> 2.7.1
[INFO]   org.apache.hadoop:hadoop-yarn-api ..................... 2.6.0 -> 2.7.1
[INFO]   org.apache.httpcomponents:httpclient .................... 4.4.1 -> 4.5
[INFO]   org.apache.lucene:lucene-analyzers-common ............ 4.10.4 -> 5.2.1
[INFO]   org.apache.lucene:lucene-core ........................ 4.10.4 -> 5.2.1
[INFO]   org.apache.lucene:lucene-queryparser ................. 4.10.4 -> 5.2.1
[INFO]   org.apache.spark:spark-streaming_2.10 ................. 1.3.1 -> 1.4.1
[INFO]   org.aspectj:aspectjweaver ............................. 1.8.5 -> 1.8.6
[INFO]   org.eclipse.jetty:jetty-jsp ............. 9.2.11.v20150529 -> 9.3.0.M1
[INFO]   org.eclipse.jetty:jetty-server ... 9.2.11.v20150529 -> 9.3.2.v20150730
[INFO]   org.eclipse.jetty:jetty-servlet ...
[INFO]                                      9.2.11.v20150529 -> 9.3.2.v20150730
[INFO]   org.eclipse.jetty:jetty-servlets ...
[INFO]                                      9.2.11.v20150529 -> 9.3.2.v20150730
[INFO]   org.eclipse.jetty:jetty-webapp ... 9.2.11.v20150529 -> 9.3.2.v20150730
[INFO]   org.mockito:mockito-all ........................ 1.10.19 -> 2.0.2-beta
[INFO]   org.mockito:mockito-core ...................... 1.10.19 -> 2.0.31-beta
[INFO]   org.mongodb:mongo-java-driver ......................... 3.0.2 -> 3.0.3
[INFO]   org.springframework:spring-aop ........ 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-beans ...... 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-context .... 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-context-support ...
[INFO]                                           4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-core ....... 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-expression ...
[INFO]                                           4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-jdbc ....... 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-tx ......... 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework:spring-web ........ 4.1.6.RELEASE -> 4.2.0.RELEASE
[INFO]   org.springframework.security:spring-security-acl ...
[INFO]                                           3.2.7.RELEASE -> 4.0.2.RELEASE
[INFO]   org.springframework.security:spring-security-config ...
[INFO]                                           3.2.7.RELEASE -> 4.0.2.RELEASE
[INFO]   org.springframework.security:spring-security-core ...
[INFO]                                           3.2.7.RELEASE -> 4.0.2.RELEASE
[INFO]   org.springframework.security:spring-security-web ...
[INFO]                                           3.2.7.RELEASE -> 4.0.2.RELEASE
[INFO] 
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