Compile with Java 7; avoid upgrade to Spring 4
diff --git a/pom.xml b/pom.xml
index 94fe9e9..1140e8c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -32,6 +32,11 @@
executing.</description>
<properties>
+ <!-- Old-style .class files for compatibility with Spring 3
+ https://stackoverflow.com/a/22527057
+ -->
+ <maven.compiler.source>1.7</maven.compiler.source>
+ <maven.compiler.target>1.7</maven.compiler.target>
<!-- Set these to control what is used for signing code. -->
<signing.keystore>${project.parent.basedir}/src/main/signing/signing.jks</signing.keystore>
<signing.user>taverna</signing.user>
