Bump default quotas for ports, subnets, and networks

It's probably not very realistic to expect power users to be happy with
the default quotas (10 networks, 50 ports, 10 subnets). I believe that
larger defaults would be more realistic. This patch bumps existing
quotas for the aforementioned neutron resources x10 times.

DocImpact change default quotas in documentation if used in examples
          anywhere.
UpgradeImpact operators may need to revisit quotas they use.
Closes-Bug: #1674787
Change-Id: I04993934627d2d663a1bfccd7467ac4fbfbf1434

neutron/conf/quota.py

@@ -24,9 +24,9 @@ QUOTA_CONF_DRIVER = 'neutron.quota.ConfDriver'
 QUOTAS_CFG_GROUP = 'QUOTAS'
 
 DEFAULT_QUOTA = -1
-DEFAULT_QUOTA_NETWORK = 10
+DEFAULT_QUOTA_NETWORK = 100
-DEFAULT_QUOTA_SUBNET = 10
+DEFAULT_QUOTA_SUBNET = 100
-DEFAULT_QUOTA_PORT = 50
+DEFAULT_QUOTA_PORT = 500
 DEFAULT_QUOTA_SG = 10
 DEFAULT_QUOTA_SG_RULE = 100
 DEFAULT_QUOTA_ROUTER = 10

neutron/tests/contrib/hooks/quotas

@@ -2,9 +2,6 @@
 
 [quotas]
 # x10 of default quotas (at the time of writing)
-quota_network=100
-quota_subnet=100
-quota_port=500
 quota_router=100
 quota_floatingip=500
 quota_security_group=100

releasenotes/notes/bump-default-quotas-810570badb378c50.yaml

@@ -0,0 +1,10 @@
+---
+prelude: >
+    Default quotas for the following resources were increased: networks (from
+    10 to 100), subnets (from 10 to 100), ports (from 50 to 500).
+upgrade:
+  - |
+      Default quotas were bumped for the following resources: networks (from 10
+      to 100), subnets (from 10 to 100), ports (from 50 to 500). If you want to
+      stick to old values, consider explicitly setting them in the
+      ``neutron.conf`` file.