Update the log level to warn when there is an error in un-deploy erros

components/org.wso2.micro.integrator.initializer/src/main/java/org/wso2/micro/integrator/initializer/deployment/synapse/deployer/SynapseAppDeployer.java

@@ -797,7 +797,7 @@ public void deleteImport(String importQualifiedName, AxisConfiguration axisConfi
                 }
             }
         } catch (Exception e) {
-            log.error("Error occured while deleting the synapse library import");
+            log.warn("Error occured while deleting the synapse library import");
         }
     }