WT-2142. At the end of a test run, all open connections should be closed

to prevent cascading errors. Clean up and (mostly) standardize how connection
configuration is added to and modified.

Details:
- class TestSuiteConnection wraps an opened Connection,
  calls to close() remove it from the list of active connections.

- WiredTigerTestCase.wiredtiger_open uses a TestSuiteConnection, and this
  version of wiredtiger_open is now used everywhere.

- in tearDown(), active connections are explicitly closed.

- In WiredTigerTestCase derived classes, we now use use self.conn_config
  if possible in tests in preference to overloading setUpConnectionOpen().

- Explicitly call close on extra connections created dynamically.

- Remove some unused code.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/suite/test_join03.py b/test/suite/test_join03.py
index 552e3b41748..9d97232b81e 100644
--- a/test/suite/test_join03.py
+++ b/test/suite/test_join03.py
@@ -61,7 +61,7 @@ class test_join03(wttest.WiredTigerTestCase):
         extarg = self.extensionArg([('extractors', 'csv', 'csv_extractor')])
         connarg = 'create,error_prefix="{0}: ",{1}'.format(
             self.shortid(), extarg)
-        conn = wiredtiger.wiredtiger_open(dir, connarg)
+        conn = self.wiredtiger_open(dir, connarg)
         self.pr(`conn`)
         return conn