resolving logback-classic 1.13 from security issue

cdp-pal and eelf are the jar using logback-classic 1.1.3.
need to use exclusions option in pom file

Issue-ID: APPC-1018
Change-Id: I00b41f9c366a5ead3f4205cd6fa6b9eb74599767
Signed-off-by: Taka Cho <tc012c@att.com>
diff --git a/appc-config/appc-flow-controller/provider/pom.xml b/appc-config/appc-flow-controller/provider/pom.xml
index f3cd09b..4a6da1f 100644
--- a/appc-config/appc-flow-controller/provider/pom.xml
+++ b/appc-config/appc-flow-controller/provider/pom.xml
@@ -69,8 +69,19 @@
             <artifactId>jackson-dataformat-yaml</artifactId>
         </dependency>
         <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+	    <version>${logback.version}</version>
+        </dependency>
+        <dependency>
             <groupId>com.att.eelf</groupId>
             <artifactId>eelf-core</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>ch.qos.logback</groupId>
+                    <artifactId>logback-classic</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.onap.ccsdk.sli.adaptors</groupId>