Compiler Version
~ Rase Maven compiler version to fix build error
<build>
<plugins>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-compiler-plugin</artifactId>
+ <version>3.7.0</version>
+ <configuration>
+ <source>1.9</source>
+ <target>1.9</target>
+ </configuration>
+ </plugin>
<plugin>
<groupId>org.sonatype.plugins</groupId>
<artifactId>nexus-staging-maven-plugin</artifactId>
