[ZEPPELIN-5800] upgrade version of apache commons configuration2 to 2…

….8 (apache#4445)

pom.xml

@@ -123,7 +123,7 @@
     <commons.compress.version>1.21</commons.compress.version>
     <commons.lang3.version>3.12.0</commons.lang3.version>
     <commons.text.version>1.8</commons.text.version>
-    <commons.configuration2.version>2.7</commons.configuration2.version>
+    <commons.configuration2.version>2.8.0</commons.configuration2.version>
     <commons.exec.version>1.3</commons.exec.version>
     <commons.codec.version>1.14</commons.codec.version>
     <commons.io.version>2.7</commons.io.version>

zeppelin-distribution/src/bin_license/LICENSE

@@ -8,7 +8,7 @@ The following components are provided under Apache License.
     (Apache 2.0) Apache Commons Codec (commons-codec:commons-codec:1.5 - http://commons.apache.org/proper/commons-codec/)
     (Apache 2.0) Apache Commons Collections (commons-collections:commons-collections:3.2.2 - http://commons.apache.org/proper/commons-configuration/)
     (Apache 2.0) Apache Commons Compress (org.apache.commons:commons-compress:1.21 - http://commons.apache.org/proper/commons-compress/)
-    (Apache 2.0) Apache Commons Configuration (org.apache.commons:commons-configuration2:2.7 - http://commons.apache.org/configuration/)
+    (Apache 2.0) Apache Commons Configuration (org.apache.commons:commons-configuration2:2.8.0 - http://commons.apache.org/configuration/)
     (Apache 2.0) Apache Commons CLI (commons-cli:commons-cli:1.2 - http://commons.apache.org/cli/)
     (Apache 2.0) Apache Commons Exec (commons-exec:commons-exec:1.3 - http://commons.apache.org/exec/)
     (Apache 2.0) Http Components (org.apache.httpcomponents:httpcore:4.3.3 - https://github.com/apache/httpclient)