Fix tox.ini issue and minor changes

The Hawthorn tests were not running due to a recent typo I added in the
tox.ini 'commands' section. Fixed that.

Also calling out Hawthorn in the same way as Ginko and Juniper. Now all
have Open edX release specific pytest-<named release>.ini files and
Hawthorn now specifies the 'OPENEDX_RELEASE' also

This means that regardless of what the default environment that is set
in the settings, the Hawthorn tests will specify the proper environment

pytest-hawthorn.ini

@@ -0,0 +1,6 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = devsite.test_settings
+
+norecursedirs = .* docs requirements
+python_paths = devsite mocks/hawthorn
+testpaths = ./tests

tox.ini

@@ -37,15 +37,16 @@ whitelist_externals =
 setenv =
 	DJANGO_SETTINGS_MODULE = devsite.test_settings
 	PYTHONPATH = {toxinidir}
-	# We don't need to call out Hawthorn as it is the current default environment
 	ginkgo: OPENEDX_RELEASE = GINKGO
+	hawthorn: OPENEDX_RELEASE = HAWTHORN
+	hawthorn_multisite: OPENEDX_RELEASE = HAWTHORN
 	py35_juniper: OPENEDX_RELEASE = JUNIPER
 	py38_juniper: OPENEDX_RELEASE = JUNIPER
 
 commands = 
 	ginkgo: pytest -c pytest-ginkgo.ini {posargs}
-	hawhthorn: pytest {posargs}
-	hawhthorn_multisite: pytest {posargs}
+	hawthorn: pytest -c pytest-hawthorn.ini {posargs}
+	hawthorn_multisite: pytest -c pytest-hawthorn.ini {posargs}
 	py35_juniper: pytest -c pytest-juniper.ini {posargs}
 	py38_juniper: pytest -c pytest-juniper.ini {posargs}