[FLINK-10107] [e2e] Exclude conflicting SQL JARs from test

This is a temporary solution for fixing the SQL Client end-to-end
test for releases. For now, we do not include conflicting
SQL JARs in library folder of the test.

This closes apache#6528.

flink-end-to-end-tests/flink-sql-client-test/pom.xml

@@ -153,27 +153,29 @@ under the License.
  <classifier>sql-jar</classifier>
  <type>jar</type>
  </artifactItem>
+ <!-- This SQL JAR is not used for now to avoid dependency conflicts; see FLINK-10107.
  <artifactItem>
  <groupId>org.apache.flink</groupId>
  <artifactId>flink-connector-kafka-0.9_${scala.binary.version}</artifactId>
  <version>${project.version}</version>
  <classifier>sql-jar</classifier>
  <type>jar</type>
- </artifactItem>
+ </artifactItem>-->
  <artifactItem>
  <groupId>org.apache.flink</groupId>
  <artifactId>flink-connector-kafka-0.10_${scala.binary.version}</artifactId>
  <version>${project.version}</version>
  <classifier>sql-jar</classifier>
  <type>jar</type>
  </artifactItem>
+ <!-- This SQL JAR is not used for now to avoid dependency conflicts; see FLINK-10107.
  <artifactItem>
  <groupId>org.apache.flink</groupId>
  <artifactId>flink-connector-kafka-0.11_${scala.binary.version}</artifactId>
  <version>${project.version}</version>
  <classifier>sql-jar</classifier>
  <type>jar</type>
- </artifactItem>
+ </artifactItem>-->
  </artifactItems>
  </configuration>
  </execution>