[SPARK-7845] [BUILD] Bumping default Hadoop version used in profile hadoop-1 to 1.2.1

PR #5694 reverted PR #6384 while refactoring `dev/run-tests` to `dev/run-tests.py`. Also, PR #6384 didn't bump Hadoop 1 version defined in POM.

Author: Cheng Lian <lian@databricks.com>

Closes #7062 from liancheng/spark-7845 and squashes the following commits:

c088b72 [Cheng Lian] Bumping default Hadoop version used in profile hadoop-1 to 1.2.1

dev/run-tests.py

@@ -261,7 +261,7 @@ def get_hadoop_profiles(hadoop_version):
     """
 
     sbt_maven_hadoop_profiles = {
-        "hadoop1.0": ["-Phadoop-1", "-Dhadoop.version=1.0.4"],
+        "hadoop1.0": ["-Phadoop-1", "-Dhadoop.version=1.2.1"],
         "hadoop2.0": ["-Phadoop-1", "-Dhadoop.version=2.0.0-mr1-cdh4.1.1"],
         "hadoop2.2": ["-Pyarn", "-Phadoop-2.2"],
         "hadoop2.3": ["-Pyarn", "-Phadoop-2.3", "-Dhadoop.version=2.3.0"],

pom.xml

@@ -1686,7 +1686,7 @@
     <profile>
       <id>hadoop-1</id>
       <properties>
-        <hadoop.version>1.0.4</hadoop.version>
+        <hadoop.version>1.2.1</hadoop.version>
         <protobuf.version>2.4.1</protobuf.version>
         <hbase.version>0.98.7-hadoop1</hbase.version>
         <avro.mapred.classifier>hadoop1</avro.mapred.classifier>