update logback-classic to 1.3

Author: maximthomas

OpenICF-java-framework/pom.xml

@@ -53,7 +53,7 @@
             Build-Jdk,Tool
         </openicf.osgi.remove.headers>
 
-        <logback.version>1.2.13</logback.version>
+        <logback.version>1.3.15</logback.version>
         <protobuf-java.version>3.0.2</protobuf-java.version>
 
         <!-- Core documentation properties -->

OpenICF-ssh-connector/pom.xml

@@ -94,7 +94,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.13</version>
+            <version>${logback.version}</version>
         </dependency>
     </dependencies>
     <build>