[FLINK-6514] [build] Remove 'flink-shaded-hadoop2' from 'flink-dist' via exclusions

This is more tedious/manual than setting it to 'provided' once, but it
is also correct.

For example, in the case of Hadoop 2.3, having 'flink-shaded-hadoop2' as 'provided'
removes other needed dependencies as well, such as 'org.codehaus.jackson' from avro.

flink-dist/pom.xml

@@ -47,36 +47,72 @@ under the License.
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-java</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-scala_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-runtime_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-runtime-web_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-optimizer_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-clients_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
@@ -89,24 +125,48 @@ under the License.
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-streaming-scala_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-python_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-scala-shell_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>
@@ -137,6 +197,12 @@ under the License.
 			<groupId>org.apache.flink</groupId>
 			<artifactId>flink-yarn_${scala.binary.version}</artifactId>
 			<version>${project.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.flink</groupId>
+					<artifactId>flink-shaded-hadoop2</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<!-- Concrete logging framework - we add this only here (and not in the 
@@ -253,13 +319,7 @@ under the License.
 			<version>${project.version}</version>
 			<scope>provided</scope>
 		</dependency>
-
-		<dependency>
-			<groupId>org.apache.flink</groupId>
-			<artifactId>flink-shaded-hadoop2</artifactId>
-			<version>${project.version}</version>
-			<scope>provided</scope>
-		</dependency>
+		
 		<!-- end optional Flink libraries -->
 
 		<!-- test dependencies -->