pip installing tensorflow serving seems to be uninstalling the installed

version of tensorflow (1.15.0) and replacing with 2.0, leading to errors of
missing contrib -- so install a pinned version.

Make an error in all_problems.py log earlier.

Reverting the earlier change about tf flags not being shipped with TF, because of this TF 2.0 subterfuge.

PiperOrigin-RevId: 281893644

oss_scripts/oss_integration_test.sh

@@ -40,7 +40,7 @@ then
   sleep 10
 
   # Query
-  pip install tensorflow-serving-api
+  pip install tensorflow-serving-api=="$TF_VERSION"
   t2t-query-server \
       --server=localhost:$server_port \
       --servable_name=$model_name \

setup.py

@@ -33,7 +33,6 @@
         'tensor2tensor/bin/t2t-translate-all',
     ],
     install_requires=[
-        'absl-py',
         'bz2file',
         'dopamine-rl',
         'flask',
@@ -65,6 +64,7 @@
         'tensorflow': ['tensorflow>=1.15.0'],
         'tensorflow-hub': ['tensorflow-hub>=0.1.1'],
         'tests': [
+            'absl-py',
             # Needed to fix a Travis pytest error.
             # https://github.com/Julian/jsonschema/issues/449#issuecomment-411406525
             'attrs>=17.4.0',

tensor2tensor/data_generators/all_problems.py

@@ -126,11 +126,11 @@ def _handle_errors(errors):
   print(err_msg.format(num_missing=len(errors)))
   for module, err in errors:
     err_str = str(err)
+    if log_all:
+      print("Did not import module: %s; Cause: %s" % (module, err_str))
     if not _is_import_err_msg(err_str, module):
       print("From module %s" % module)
       raise err
-    if log_all:
-      print("Did not import module: %s; Cause: %s" % (module, err_str))
 
 
 def import_modules(modules):

tensor2tensor/data_generators/audio.py

@@ -22,9 +22,10 @@
 import subprocess
 import tarfile
 import wave
-from absl import flags
+
 import tensorflow as tf
 
+flags = tf.flags
 FLAGS = flags.FLAGS
 
 flags.DEFINE_string("timit_paths", "",