[FLINK-4292] [batch connectors] Fix setup of HCatalog project by adding Scala SDK dependency

flink-batch-connectors/flink-hcatalog/pom.xml

@@ -48,6 +48,12 @@ under the License.
 			<version>0.12.0</version>
 		</dependency>
 
+		<dependency>
+			<groupId>org.scala-lang</groupId>
+			<artifactId>scala-library</artifactId>
+			<scope>provided</scope>
+		</dependency>
+
 	</dependencies>
 
 	<build>
@@ -56,7 +62,6 @@ under the License.
 			<plugin>
 				<groupId>net.alchim31.maven</groupId>
 				<artifactId>scala-maven-plugin</artifactId>
-				<version>3.1.4</version>
 				<executions>
 					<!-- Run scala compiler in the process-resources phase, so that dependencies on
 						scala classes can be resolved later in the (Java) compile phase -->

flink-batch-connectors/flink-hcatalog/src/main/scala/org/apache/flink/hcatalog/scala/HCatInputFormat.scala

@@ -28,7 +28,7 @@ import org.apache.hive.hcatalog.data.schema.HCatFieldSchema
  * A InputFormat to read from HCatalog tables.
  * The InputFormat supports projection (selection and order of fields) and partition filters.
  *
- * Data can be returned as {@link HCatRecord} or Scala tuples.
+ * Data can be returned as [[HCatRecord]] or Scala tuples.
  * Scala tuples support only up to 22 fields.
  *
  */

flink-streaming-scala/pom.xml

@@ -215,7 +215,7 @@ under the License.
 				</configuration>
 			</plugin>
 
-			<!-- Exclude generated classes from api compatibilty checks -->
+			<!-- Exclude generated classes from api compatibility checks -->
 			<plugin>
 				<groupId>com.github.siom79.japicmp</groupId>
 				<artifactId>japicmp-maven-plugin</artifactId>