[SPARK-5474][Build]curl should support URL redirection in build/mvn

Author: GuoQiang Li <witgo@qq.com>

Closes #4263 from witgo/SPARK-5474 and squashes the following commits:

ef397ff [GuoQiang Li] review commits
a398324 [GuoQiang Li] curl should support URL redirection in build/mvn

build/mvn

@@ -34,14 +34,14 @@ install_app() {
   local binary="${_DIR}/$3"
 
   # setup `curl` and `wget` silent options if we're running on Jenkins
-  local curl_opts=""
+  local curl_opts="-L"
   local wget_opts=""
   if [ -n "$AMPLAB_JENKINS" ]; then
-    curl_opts="-s"
-    wget_opts="--quiet"
+    curl_opts="-s ${curl_opts}"
+    wget_opts="--quiet ${wget_opts}"
   else
-    curl_opts="--progress-bar"
-    wget_opts="--progress=bar:force"
+    curl_opts="--progress-bar ${curl_opts}"
+    wget_opts="--progress=bar:force ${wget_opts}"
   fi
 
   if [ -z "$3" -o ! -f "$binary" ]; then

dev/check-license

@@ -31,7 +31,7 @@ acquire_rat_jar () {
       printf "Attempting to fetch rat\n"
       JAR_DL="${JAR}.part"
       if [ $(command -v curl) ]; then
-        curl --silent "${URL}" > "$JAR_DL" && mv "$JAR_DL" "$JAR"
+        curl -L --silent "${URL}" > "$JAR_DL" && mv "$JAR_DL" "$JAR"
       elif [ $(command -v wget) ]; then
         wget --quiet ${URL} -O "$JAR_DL" && mv "$JAR_DL" "$JAR"
       else