Update guacamole-common build to Java 1.8.
Without Java 1.8, we cannot add new functions to established interfaces
without breaking backward compatibility.
<build>
<plugins>
- <!-- Written for 1.6 -->
+ <!-- Written for 1.8 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
- <source>1.6</source>
- <target>1.6</target>
+ <source>1.8</source>
+ <target>1.8</target>
<compilerArgs>
<arg>-Xlint:all</arg>
<arg>-Werror</arg>
