upgrade swagger-core to 2.2.7

Author: bnasslahsen

pom.xml

@@ -68,7 +68,7 @@
 		<maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
 		<maven-release-plugin.version>2.5.3</maven-release-plugin.version>
 		<nexus-staging-maven-plugin>1.6.8</nexus-staging-maven-plugin>
-		<swagger-api.version>2.2.6</swagger-api.version>
+		<swagger-api.version>2.2.7</swagger-api.version>
 		<swagger-ui.version>4.15.5</swagger-ui.version>
 		<spring-security-oauth2.version>2.5.2.RELEASE</spring-security-oauth2.version>
 		<classgraph.version>4.8.149</classgraph.version>