Bump commons-validator from 1.6 to 1.7 in /core

Bumps commons-validator from 1.6 to 1.7.

Signed-off-by: dependabot[bot] <support@github.com>

Closes #99

Change-Id: I91211829c52336916c8bca374b8ed2b72060fca3
diff --git a/core/pom.xml b/core/pom.xml
index 9f19248..bafd2e3 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -281,7 +281,7 @@
 		<dependency>
 			<groupId>commons-validator</groupId>
 			<artifactId>commons-validator</artifactId>
-			<version>1.6</version>
+			<version>1.7</version>
 		</dependency>
 
 		<dependency>