use variable

Author: mkleene

sdk/pom.xml

@@ -229,7 +229,7 @@
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp-tls</artifactId>
-            <version>4.12.0</version>
+            <version>${okhttp.version}</version>
             <scope>test</scope>
             <exclusions>
                 <exclusion>