Update the minimum supported Java version to 8

Author: itoshkov

pom.xml

@@ -34,8 +34,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.5</version>
                 <configuration>
-                    <source>1.7</source>
-                    <target>1.7</target>
+                    <source>1.8</source>
+                    <target>1.8</target>
                 </configuration>
             </plugin>
         </plugins>

release.sh prepare-release.shrelease.sh renamed to prepare-release.sh

@@ -9,7 +9,7 @@ cd $(dirname $0)
 
 rm -rf $RELEASE_DIR
 
-mvn clean package
+mvn clean verify
 
 DIR=$(mktemp -d)
 INST_DIR="${DIR}/${DIST_NAME}/bin"