Move iso8601 as a test dependency only

Ironic does not import and use this module directly, no need to list
it in the requirements and no need to set log level.
Instead it was moved to test-requirements.txt file because
it is explicitly imported for unit tests.

Change-Id: I791be24289f620a4227ec6514d77c37a5f8d920e

etc/ironic/ironic.conf.sample

@@ -250,7 +250,7 @@
 
 # List of logger=LEVEL pairs. This option is ignored if
 # log_config_append is set. (list value)
-#default_log_levels=amqp=WARN,amqplib=WARN,boto=WARN,qpid=WARN,sqlalchemy=WARN,suds=INFO,oslo.messaging=INFO,iso8601=WARN,requests.packages.urllib3.connectionpool=WARN,urllib3.connectionpool=WARN,websocket=WARN,requests.packages.urllib3.util.retry=WARN,urllib3.util.retry=WARN,keystonemiddleware=WARN,routes.middleware=WARN,stevedore=WARN,taskflow=WARN
+#default_log_levels=amqp=WARN,amqplib=WARN,boto=WARN,qpid=WARN,sqlalchemy=WARN,suds=INFO,oslo.messaging=INFO,requests.packages.urllib3.connectionpool=WARN,urllib3.connectionpool=WARN,websocket=WARN,requests.packages.urllib3.util.retry=WARN,urllib3.util.retry=WARN,keystonemiddleware=WARN,routes.middleware=WARN,stevedore=WARN,taskflow=WARN
 
 # Enables or disables publication of error events. (boolean
 # value)
@@ -2043,5 +2043,3 @@
 # Port on which VirtualBox web service is listening. (port
 # value)
 #port=18083
-
-

ironic/common/service.py

@@ -131,7 +131,6 @@ def prepare_service(argv=[]):
                                          'keystoneclient=INFO',
                                          'stevedore=INFO',
                                          'eventlet.wsgi.server=WARNING',
-                                         'iso8601=WARNING',
                                          'paramiko=WARNING',
                                          'requests=WARNING',
                                          'neutronclient=WARNING',

requirements.txt

@@ -10,7 +10,6 @@ WebOb>=1.2.3
 greenlet>=0.3.2
 netaddr!=0.7.16,>=0.7.12
 paramiko>=1.13.0
-iso8601>=0.1.9
 python-neutronclient>=2.6.0
 python-glanceclient>=0.18.0
 python-keystoneclient!=1.8.0,>=1.6.0

test-requirements.txt

@@ -7,6 +7,7 @@ fixtures>=1.3.1
 mock>=1.2
 Babel>=1.3
 PyMySQL>=0.6.2 # MIT License
+iso8601>=0.1.9
 oslotest>=1.10.0 # Apache-2.0
 psycopg2>=2.5
 python-ironicclient>=0.8.0