[FLINK-32342] Set fork count to 1 for IT cases, to mitigate flaky SQL Server test. This closes #60

Author: snuyanzin

pom.xml

@@ -62,6 +62,7 @@ under the License.
         <log4j.version>2.17.2</log4j.version>
 
         <flink.parent.artifactId>flink-connector-jdbc-parent</flink.parent.artifactId>
+        <flink.forkCountITCase>1</flink.forkCountITCase>
     </properties>
 
     <dependencies>