[SPARK-7845] [BUILD] Bump "Hadoop 1" tests to version 1.2.1

https://issues.apache.org/jira/browse/SPARK-7845

Author: Yin Huai <yhuai@databricks.com>

Closes #6384 from yhuai/hadoop1Test and squashes the following commits:

82fcea8 [Yin Huai] Use hadoop 1.2.1 (a stable version) for hadoop 1 test.

dev/run-tests

@@ -40,7 +40,7 @@ function handle_error () {
 {
   if [ -n "$AMPLAB_JENKINS_BUILD_PROFILE" ]; then
     if [ "$AMPLAB_JENKINS_BUILD_PROFILE" = "hadoop1.0" ]; then
-      export SBT_MAVEN_PROFILES_ARGS="-Phadoop-1 -Dhadoop.version=1.0.4"
+      export SBT_MAVEN_PROFILES_ARGS="-Phadoop-1 -Dhadoop.version=1.2.1"
     elif [ "$AMPLAB_JENKINS_BUILD_PROFILE" = "hadoop2.0" ]; then
       export SBT_MAVEN_PROFILES_ARGS="-Phadoop-1 -Dhadoop.version=2.0.0-mr1-cdh4.1.1"
     elif [ "$AMPLAB_JENKINS_BUILD_PROFILE" = "hadoop2.2" ]; then