Merge pull request #85 from scalecube/rollback-to-java8

Changed compiler options for jdk 8

Author: artem-v

pom.xml

@@ -156,7 +156,9 @@
           <artifactId>maven-compiler-plugin</artifactId>
           <version>${maven-compiler-plugin.version}</version>
           <configuration>
-            <release>11</release>
+            <source>1.8</source>
+            <target>1.8</target>
+            <optimize>true</optimize>
           </configuration>
         </plugin>
         <plugin>