Change state_path to use its default value

State_path is defined in gluon/conf/config.py, its default value is $gluon_home/gluon.
In the [default] section of the /etc/proton/proton.conf file, its value overrided to
/opt/proton/ which can cause confusion. This patch changes it back to use default value
for state_path defined in gluon/conf/config.py.

Change-Id: I6af2d7e04e51b0476430975c10cc01fca24c9d9d

doc/samples/proton.conf.sample

@@ -1,5 +1,5 @@
 [DEFAULT]
-state_path = /var/lib/proton
+
 #
 # From oslo.log
 #
@@ -350,5 +350,4 @@ state_path = /var/lib/proton
 #bindir = $pybasedir/bin
 
 # Top-level directory for maintaining gluon's state. (string value)
-# (JinLi) use the one in [default]
 #state_path = $pybasedir

etc/proton/proton.conf

@@ -1,7 +1,11 @@
 # /etc/proton/proton.conf file
 
 [DEFAULT]
-state_path = /opt/proton
+# state_path is defined in gluon/conf/config.py, its default value is $gluon_home/gluon.
+# sqlite stores its database file in state_path, setting state_path here will
+# overide its default value and move sqlite database from its default location
+# i.e.: sqlite:////home/ubuntu/gluon/gluon/gluon.sqlite.
+# state_path = /opt/proton
 
 
 [api]
@@ -11,7 +15,7 @@ auth_strategy = keystone
 [keystone_authtoken]
 
 # keystone identity, change 127.0.0.1 to keystone endpoint
-auth_uri = http://127.0.0.1/5000
+auth_uri = http://127.0.0.1:5000
 
 project_domain_name = Default
 
@@ -30,7 +34,7 @@ password = gluon
 username = gluon
 
 # keystone identity_admin, change 127.0.0.1 to keystone endpoint
-auth_url = http://127.0.0.1/35357
+auth_url = http://127.0.0.1:35357
 
 auth_type = password
 

gluon/db/sqlalchemy/models.py

@@ -26,9 +26,9 @@ from gluon.sync_etcd.log import logupdate
 
 
 # (enikher): for unittests
+# for example, sqlite:////home/ubuntu/gluon/gluon/gluon.sqlite
 _DEFAULT_SQL_CONNECTION = ('sqlite:///' +
                            paths.state_path_def('gluon.sqlite'))
-
 db_options.set_defaults(
     cfg.CONF, connection=_DEFAULT_SQL_CONNECTION)