ATLAS-2969: Attempt to import empty zip file should not throw excpetion

(cherry picked from commit 4ca33fcbf4e8845c86340622fb28d88e4457dccd)
diff --git a/webapp/src/main/java/org/apache/atlas/web/resources/AdminResource.java b/webapp/src/main/java/org/apache/atlas/web/resources/AdminResource.java
index 3998932..83dac65 100755
--- a/webapp/src/main/java/org/apache/atlas/web/resources/AdminResource.java
+++ b/webapp/src/main/java/org/apache/atlas/web/resources/AdminResource.java
@@ -410,10 +410,8 @@
                 LOG.info(excp.getMessage());
             } else {
                 LOG.error("importData(binary) failed", excp);
+                throw excp;
             }
-
-            throw excp;
-
         } catch (Exception excp) {
             LOG.error("importData(binary) failed", excp);