Merge pull request tensorflow#21249 from av8ramit/setup_constraint1

Adding a less than constraint on numpy.

Merge pull request tensorflow#21010 from case540/disable_sdcatest

Add no_pip_gpu to the sdca test.

Merge pull request tensorflow#20455 from lygztq/r1.9

fix bug in maxout function

Merge pull request tensorflow#19388 from nrstott/pandas_input_fn_y_as_df

Pandas input fn accepts DataFrame for Y

Merge pull request tensorflow#20020 from case540/version_string_updat…

…e_19rc1

Update version strings for 1.9.0-rc1.

Merge pull request tensorflow#19820 from av8ramit/fix_setuptools4

Adding a constraint for the setuptools version.

Merge pull request tensorflow#19089 from annarev/update_release_notes

Adding release notes for 1.7.1 release

Merge pull request tensorflow#18928 from tensorflow/release-patch-4-1

Disable python/kernel_tests/sparse_reshape_op_test.py on cmake.

Refactoring: Remove a redundant map from model.h.

Cherry picking this into TFLite r0.1.7 release for a compatibility issue.
The original Piper ID: 194306629

Merge pull request tensorflow#18679 from yifeif/cherrypicks_Z6PNR

Cherrypicks 1.8rc1 fix tf.GIT_VERSION always 'unknown' on windows cmake build (tensorflow#16730)