[SPARK-8401] [BUILD] Scala version switching build enhancements

These commits address a few minor issues in the Scala cross-version support in the build:

  1. Correct two missing `${scala.binary.version}` pom file substitutions.
  2. Don't update `scala.binary.version` in parent POM. This property is set through profiles.
  3. Update the source of the generated scaladocs in `docs/_plugins/copy_api_dirs.rb`.
  4. Factor common code out of `dev/change-version-to-*.sh` and add some validation. We also test `sed` to see if it's GNU sed and try `gsed` as an alternative if not. This prevents the script from running with a non-GNU sed.

This is my original work and I license this work to the Spark project under the Apache License.

Author: Michael Allman <michael@videoamp.com>

Closes #6832 from mallman/scala-versions and squashes the following commits:

cde2f17 [Michael Allman] Delete dev/change-version-to-*.sh, replacing them with single dev/change-scala-version.sh script that takes a version as argument
02296f2 [Michael Allman] Make the scala version change scripts cross-platform by restricting ourselves to POSIX sed syntax instead of looking for GNU sed
ad9b40a [Michael Allman] Factor change-scala-version.sh out of change-version-to-*.sh, adding command line argument validation and testing for GNU sed
bdd20bf [Michael Allman] Update source of scaladocs when changing Scala version
475088e [Michael Allman] Replace jackson-module-scala_2.10 with jackson-module-scala_${scala.binary.version}

1 files changed, 0 insertions, 26 deletions

diff --git a/dev/change-version-to-2.10.sh b/dev/change-version-to-2.10.sh
deleted file mode 100755
index c4adb1f96b..0000000000
--- a/dev/change-version-to-2.10.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env bash
-
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# 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.
-#
-
-# Note that this will not necessarily work as intended with non-GNU sed (e.g. OS X)
-BASEDIR=$(dirname $0)/..
-find $BASEDIR -name 'pom.xml' | grep -v target \
-  | xargs -I {} sed -i -e 's/\(artifactId.*\)_2.11/\1_2.10/g' {}
-
-# Also update <scala.binary.version> in parent POM
-sed -i -e '0,/<scala\.binary\.version>2.11</s//<scala.binary.version>2.10</' $BASEDIR/pom.xml