Fix code style issues

Fix e-mails in JavaDoc
Fix visibility warnings in MockForwarder
Add test ensuring public methods should be public.
Simplify logic of PitImpl
Remove redundant code: unused imports, unnecessary casts
Bump gradle version
Fix code analysis issues
Disable checkstyle code analysis; TODO configure to IntelliJ-style settings and re-enable
Add new logging statements
diff --git a/src/main/java/com/intel/jndn/mock/MockKeyChain.java b/src/main/java/com/intel/jndn/mock/MockKeyChain.java
index 7adc270..30710e1 100644
--- a/src/main/java/com/intel/jndn/mock/MockKeyChain.java
+++ b/src/main/java/com/intel/jndn/mock/MockKeyChain.java
@@ -26,7 +26,7 @@
 /**
  * Create an in-memory key chain for use in NDN-related tests.
  *
- * @author Andrew Brown <andrew.brown@intel.com>
+ * @author Andrew Brown, andrew.brown@intel.com
  */
 public final class MockKeyChain {
   /**