Bump hibernate-validator from 6.1.0.Final to 6.1.5.Final (#54)

Bumps [hibernate-validator](https://github.com/hibernate/hibernate-validator) from 6.1.0.Final to 6.1.5.Final.
- [Release notes](https://github.com/hibernate/hibernate-validator/releases)
- [Changelog](https://github.com/hibernate/hibernate-validator/blob/6.1.5.Final/changelog.txt)
- [Commits](hibernate/hibernate-validator@6.1.0.Final...6.1.5.Final)

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pom.xml

@@ -40,7 +40,7 @@
         <spring.version>5.2.7.RELEASE</spring.version>
         <spring-data.version>2.3.1.RELEASE</spring-data.version>
 
-        <hibernate-validator.version>6.1.0.Final</hibernate-validator.version>
+        <hibernate-validator.version>6.1.5.Final</hibernate-validator.version>
         <aws-java-sdk.version>1.11.820</aws-java-sdk.version>
         <junit.version>4.12</junit.version>
         <mockito.version>2.23.0</mockito.version>