Update core version in pom.xml

Author: gracekarina

pom.xml

@@ -241,7 +241,7 @@
     <properties>
         <commons-io-version>2.4</commons-io-version>
         <slf4j-version>1.6.3</slf4j-version>
-        <swagger-core-version>1.5.21-SNAPSHOT</swagger-core-version>
+        <swagger-core-version>1.5.21</swagger-core-version>
         <junit-version>4.8.1</junit-version>
         <testng-version>6.9.6</testng-version>
         <jmockit-version>1.19</jmockit-version>