Change Bundle-RequiredExecutionEnvironment declaration in MANIFEST.MF files
Set the maven-compiler-plugin to target/source JDK 1.5 using a variable.
diff --git a/slf4j-migrator/pom.xml b/slf4j-migrator/pom.xml
index f3798ef..104673b 100755
--- a/slf4j-migrator/pom.xml
+++ b/slf4j-migrator/pom.xml
@@ -24,8 +24,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>${required.jdk.version}</source>
+          <target>${required.jdk.version}</target>
         </configuration>
       </plugin>