Bump samples with java 1.6.

Author: javadev

examples/pom.xml

@@ -52,8 +52,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.8.0</version>
         <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
+          <source>1.6</source>
+          <target>1.6</target>
           <encoding>UTF-8</encoding>
           <compilerArgs>
             <arg>-Xlint:unchecked</arg>