[hotfix] Fix warnings concerning joda-time in "flink-tests"

flink-core/pom.xml

@@ -94,14 +94,12 @@ under the License.
 		<dependency>
 			<groupId>joda-time</groupId>
 			<artifactId>joda-time</artifactId>
-			<version>2.5</version>
 			<scope>test</scope>
 		</dependency>
 
 		<dependency>
 			<groupId>org.joda</groupId>
 			<artifactId>joda-convert</artifactId>
-			<version>1.7</version>
 			<scope>test</scope>
 		</dependency>
 

flink-tests/pom.xml

@@ -163,6 +163,12 @@ under the License.
 			<scope>test</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.joda</groupId>
+			<artifactId>joda-convert</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
 			<groupId>com.google.guava</groupId>
 			<artifactId>guava</artifactId>