[FLINK-1710] [table] Switch compile backend to Janino

This greatly reduces compile time while still supporting the same
feature set.

flink-dist/src/main/flink-bin/LICENSE

@@ -300,6 +300,7 @@ BSD-style licenses:
 [3-clause BSD license]
  - Kryo (https://github.com/EsotericSoftware/kryo) - Copyright (c) 2008, Nathan Sweet
  - D3 (http:https://d3js.org/) - Copyright (c) 2010-2014, Michael Bostock
+ - Janino (http:https://docs.codehaus.org/display/JANINO/Home) - Copyright (c) 2001-2010, Arno Unkrig
 
 [BSD-like License]
  - Scala Library (http:https://www.scala-lang.org/) - Copyright (c) 2002-2014 EPFL, Copyright (c) 2011-2014 Typesafe, Inc.

flink-dist/src/main/flink-bin/NOTICE

@@ -190,6 +190,14 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 
+-----------------------------------------------------------------------
+ Janino
+-----------------------------------------------------------------------
+
+Janino - An embedded Java[TM] compiler
+
+Copyright (c) 2001-2010, Arno Unkrig
+All rights reserved.
 
 -----------------------------------------------------------------------
  The Netty Project

flink-staging/flink-table/pom.xml

@@ -80,6 +80,12 @@ under the License.
  <scope>test</scope>
  </dependency>
 
+ <dependency>
+ <groupId>org.codehaus.janino</groupId>
+ <artifactId>janino</artifactId>
+ <version>2.7.5</version>
+ </dependency>
+
  <dependency>
  <groupId>org.apache.flink</groupId>
  <artifactId>flink-tests</artifactId>

flink-staging/flink-table/src/main/java/org/apache/flink/examples/java/JavaTableExample.java

@@ -47,6 +47,7 @@ public String toString() {
  return "WC " + word + " " + count;
  }
  }
+
  public static void main(String[] args) throws Exception {
  ExecutionEnvironment env = ExecutionEnvironment.createCollectionsEnvironment();
  TableEnvironment tableEnv = new TableEnvironment();

flink-staging/flink-table/src/main/scala/org/apache/flink/api/table/Table.scala

@@ -216,7 +216,7 @@ case class Table(private[flink] val operation: PlanNode) {
  }
 
  /**
- * Joins to [[Table]]s. Similar to an SQL join. The fields of the two joined
+ * Joins two [[Table]]s. Similar to an SQL join. The fields of the two joined
  * operations must not overlap, use [[as]] to rename fields if necessary. You can use
  * where and select clauses after a join to further specify the behaviour of the join.
  *