IMPALA-7825: Upgrade Thrift version to 0.11.0

Before this patch Impala mainly used Thrift 0.9.3, but it was
possible to compile Impala shell with Thrift 0.11.0, so the 0.11.0
Thrift lib was already included in the toolchain.

Most of the changes are related to replacing boost:: with std::
shared_ptr-s in cpp code (this is a continuation of patch by Sahil).

The Thrift upgrade also needs an Impyla release with Thrift 0.11.0, as
Impala's test framework relies on Impyla. A thrift_sasl release is also
needed, because it currently pins Thrift version to 0.9.3 for Python 2.

The current patch uses alpha releases from Impyla and thrift_sasl that
use thrift 0.11.0.

Notable side effects:
- old logic to compile thrift for impala-shell with 0.11.0 was removed
- impala_shell's utf8 handling had to be updated as the new 0.11.0
  compilation happens with no_utf8strings. This also made things a
  bit faster, e.g the following is ~0.22s instead of ~0.25
  shell/impala_shell.py \
    -B -q "select * from functional_parquet.alltypes;" > /dev/null
- THRIFT-3921 changed the stream operators to print an enum's name
  instead of its number, leading to slightly different messages
  in some cases.
- "templates" was added to the thift generator's parameters to avoid
  a compilation issue (related to IMPALA-10600). I didn't notice any
  change in compilation time. This option generated .tcc files with
  templetized readers/writers for Thrift types. Currently we don't
  use these, but they could potentially speed up (de)serialization.

Testing:
- ran Impyla's test suite with Python 2 and 3
- ran core tests

Change-Id: Idd13f177b4f7acc07872ea6399035aa180ef6ab6
Reviewed-on: http://gerrit.cloudera.org:8080/17170
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

infra/python/deps/requirements.txt

@@ -34,11 +34,11 @@ hdfs == 2.0.2
   docopt == 0.6.2
   execnet == 1.4.0
     apipkg == 1.4
-impyla == 0.17a1
+impyla == 0.17a3
   bitarray == 1.2.1
   sasl == 0.2.1
   # six == 1.14.0 (specified separately)
-  thrift_sasl == 0.4.2
+  thrift_sasl == 0.4.3a1
 kazoo == 2.2.1
 pexpect == 3.3
 pg8000 == 1.10.2