[SPARK-5469] restructure pyspark.sql into multiple files

[davies]

All the DataTypes moved into pyspark.sql.types

The changes can be tracked by --find-copies-harder -M25

davies@localhost:~/work/spark/python$ git diff --find-copies-harder -M25 --numstat master..
2       5       python/docs/pyspark.ml.rst
0       3       python/docs/pyspark.mllib.rst
10      2       python/docs/pyspark.sql.rst
1       1       python/pyspark/mllib/linalg.py
21      14      python/pyspark/{mllib => sql}/__init__.py
14      2108    python/pyspark/{sql.py => sql/context.py}
10      1772    python/pyspark/{sql.py => sql/dataframe.py}
7       6       python/pyspark/{sql_tests.py => sql/tests.py}
8       1465    python/pyspark/{sql.py => sql/types.py}
4       2       python/run-tests
1       1       sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala

Also git blame -C -C python/pyspark/sql/context.py to track the history.

[SparkQA]

Test build #27121 has started for PR 4479 at commit 2b2b983.

• This patch does not merge cleanly.

[SparkQA]

Test build #27122 has started for PR 4479 at commit 1b5f0a5.

• This patch merges cleanly.

[SparkQA]

Test build #27121 has finished for PR 4479 at commit 2b2b983.

• This patch fails Spark unit tests.
• This patch does not merge cleanly.
• This patch adds no public classes.

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
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Test FAILed.

[SparkQA]

Test build #27122 has finished for PR 4479 at commit 1b5f0a5.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
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Test FAILed.

[davies]

@rxin I think this PR is ready, the failed tests are flaky, not related to this one.

[rxin]

Jenkins, retest this please.

[SparkQA]

Test build #27128 has started for PR 4479 at commit 1b5f0a5.

• This patch merges cleanly.

[SparkQA]

Test build #594 has started for PR 4479 at commit 1b5f0a5.

• This patch merges cleanly.

[SparkQA]

Test build #27128 has finished for PR 4479 at commit 1b5f0a5.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/27128/
Test FAILed.

[SparkQA]

Test build #594 has finished for PR 4479 at commit 1b5f0a5.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[rxin]

Jenkins, retest this please.

[SparkQA]

Test build #27151 has started for PR 4479 at commit 1b5f0a5.

• This patch merges cleanly.

[SparkQA]

Test build #27151 has finished for PR 4479 at commit 1b5f0a5.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[AmplabJenkins]

Test PASSed.
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Test PASSed.

[rxin]

Thanks. I'm merging this in master and 1.3.