gnu: Run some tests in the mongodb package check phase.

Previously the mongodb dbtests and unittests were only built, and not actually
run.

* gnu/packages/databases.scm (mongodb)[native-inputs]: Add python2-minimal,
  python2-pymongo and python2-pyyaml for running the resmoke.py program, and
  add tzdata as some tests fail without this.
  [arguments]: Run the tests through the resmoke.py script in the check phase,
  set TZDIR as a couple of tests seem to depend on this, add a comment about
  the resource requirements of the tests, as they require a large amount of
  disk space, and disable the async_stream_test, as it seems to hang.

gnu: Build wiredtiger with builtin compressors.

WiredTiger is used by MongoDB, and it seems to require it to be built with
builtin support for snappy compression.

* gnu/packages/databases.scm (wiredtiger)[arguments]: Replace --enable-zlib
  and --enable-snappy with --with-builtins=snappy,zlib.

gnu: python-sqlalchemy-utils: Update to 0.32.21.

* gnu/packages/databases.scm (python-sqlalchemy-utils): Update to 0.32.21.

gnu: python-sadisplay: Update to 0.4.8.

* gnu/packages/databases.scm (python-sadisplay): Update to 0.4.8.

gnu: check, databases: Use HTTPS for bitbucket.org.

* gnu/packages/check.scm (python-pytest-capturelog)[home-page]: Likewise.
* gnu/packages/databases.scm (python-alembic)[home-page]: Likewise.

gnu: python-redis: Update to 2.10.6.

* gnu/packages/databases.scm (python-redis): Update to 2.10.6.

gnu: python-alembic: Update to 0.9.6.

* gnu/packages/databases.scm (python-alembic): Update to 0.9.6.

gnu: Build wiredtiger with snappy support.

This is probably necessary to get the MongoDB package in Guix to successfully
use the Guix wiredtiger package, as MongoDB it uses wiredtiger with snappy by
default.

* gnu/packages/databases.scm (wiredtiger)[arguments]: Add --enable-snappy to
  #:configure-flags.
  [inputs]: Add snappy.

gnu: mariadb: Update to 10.1.29.

* gnu/packages/databases.scm (mariadb): Update to 10.1.29.

gnu: perl-sql-abstract: Update source uri.

* gnu/packages/databases.scm (perl-sql-abstract)[source]: Update source uri.

gnu: perl-dbd-pg: Update to 3.7.0.

* gnu/packages/databases.scm (perl-dbd-pg): Update to 3.7.0

gnu: perl-sql-abstract: Update to 1.84.

* gnu/packages/databases.scm (perl-sql-abstract): Update to 1.84

gnu: perl-dbix-class-schema-loader: Update to 0.07047.

* gnu/packages/databases.scm (perl-dbix-class-schema-loader): Update to
0.07047

gnu: perl-dbi: Update to 1.637.

* gnu/packages/databases.scm (perl-dbi): Update to 1.637

gnu: mongodb: Use scons-build-system.

* gnu/packages/databases.scm (mongodb): Switch to scons-build-system.

gnu: mongodb: Remove some bundled sources.

* gnu/packages/databases.scm (mongodb)[source]: Add snippet to remove
some of the bundled sources.
[input]: Remove unused boost input.

gnu: mongodb: Use system wiredtiger when available.

* gnu/packages/databases.scm (mongodb)[inputs]: Add wiredtiger on
64-bit systems.
[arguments]: When using wiredtiger, use system wiredtiger.

gnu: mongodb: Build without wiredtiger on 32-bit systems.

* gnu/packages/databases.scm (mongodb)[arguments]: Add a configure-flag
to build without wiredtiger support on 32-bit systems.

gnu: mongodb: Update to 3.4.10.

* gnu/packages/databases.scm (mongodb): Update to 3.4.10.

gnu: Add python-pyodbc.

* gnu/packages/databases.scm (python-pyodbc, python2-pyodbc): New variables.