Add Standard available state

The assess status functions in charms_openstack look for an
interface to have emitted a state named {relation_name}.available
to show it is complete. This patch adds that state.

Change-Id: I7dff0f5821c9feed306c98e3fa730a3642f78a11

.gitreview

@@ -0,0 +1,4 @@
+[gerrit]
+host=review.openstack.org
+port=29418
+project=openstack/charm-interface-odl-controller-api.git

requires.py

@@ -12,14 +12,14 @@ class ControllerAPIRequires(RelationBase):
     def changed(self):
         self.set_state('{relation_name}.connected')
         if self.connection():
-            self.set_state('{relation_name}.access.available')
+            self.set_state('{relation_name}.available')
         else:
-            self.remove_state('{relation_name}.access.available')
+            self.remove_state('{relation_name}.available')
 
     @hook('{requires:odl-controller-api}-relation-broken')
     def broken(self):
         self.remove_state('{relation_name}.connected')
-        self.remove_state('{relation_name}.access.available')
+        self.remove_state('{relation_name}.available')
 
     def connection(self):
         """OpenDayLight Controller Access Details

test-requirements.txt

@@ -0,0 +1,2 @@
+flake8>=2.2.4,<=2.4.1
+os-testr>=0.4.1

tox.ini

@@ -0,0 +1,40 @@
+[tox]
+envlist = pep8,py27,py34,py35
+skipsdist = True
+skip_missing_interpreters = True
+
+[testenv]
+setenv = VIRTUAL_ENV={envdir}
+         PYTHONHASHSEED=0
+install_command =
+  pip install --allow-unverified python-apt {opts} {packages}
+commands = ostestr {posargs}
+
+[testenv:py27]
+basepython = python2.7
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+commands = /bin/true
+
+[testenv:py34]
+basepython = python3.4
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+commands = /bin/true
+
+[testenv:py35]
+basepython = python3.5
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+commands = /bin/true
+
+[testenv:pep8]
+basepython = python2.7
+deps = -r{toxinidir}/test-requirements.txt
+commands = flake8 {posargs}
+
+[testenv:venv]
+commands = {posargs}
+
+[flake8]
+ignore = E402,E226