roll back the logback version

Change-Id: I34661e29c605b7731c92412d9c0c57c91583e8a4
Issue-ID: APPC-684
Signed-off-by: Taka Cho <tc012c@att.com>
diff --git a/appc-outbound/appc-network-inventory-client/pom.xml b/appc-outbound/appc-network-inventory-client/pom.xml
index 0dd2923..bd38065 100755
--- a/appc-outbound/appc-network-inventory-client/pom.xml
+++ b/appc-outbound/appc-network-inventory-client/pom.xml
@@ -36,7 +36,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<logback.version>1.2.3</logback.version>
+		<logback.version>1.1.1</logback.version>
 		<common.collections.version>3.2.2</common.collections.version>
 		<common.io.version>2.5</common.io.version>
 		<jettison.version>1.3.7</jettison.version>