Remove sqlite_db in set_defaults()

Config option sqlite_db was removed from oslo.db[1].  Unit tests will be
failed if this argument is set, so we shouldn't set its default value.

[1]cc64f70105

Change-Id: I0f84690a538544a76d2ee536e2c6378d91055528

bilean/tests/common/utils.py

@@ -44,9 +44,7 @@ def random_name():
 
 def setup_dummy_db():
     options.cfg.set_defaults(options.database_opts, sqlite_synchronous=False)
-    options.set_defaults(cfg.CONF,
-                         connection="sqlite://",
-                         sqlite_db='bilean.db')
+    options.set_defaults(cfg.CONF, connection="sqlite://")
     engine = get_engine()
     db_api.db_sync(engine)
     engine.connect()

setup.cfg

@@ -16,7 +16,6 @@ classifier =
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.4
     Programming Language :: Python :: 3.5
 
 [files]

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = py35,py34,py27,pep8
+envlist = py35,py27,pep8
 skipsdist = True
 
 [testenv]