Move to 2019.4

Make changes to update_schemas.py needed for the move and run
update_schemas.py.

To see an overview of 2019.4 see
https://www.dmtf.org/sites/default/files/Redfish_Release_2019.4_Overview.pdf

Tested: Built bmcweb, loaded on a Witherspoon, and ran
        the validator. No errors.

See new schemas:
 curl -k https://${bmc}/redfish/v1/JsonSchemas/VCATEntry
{
    "@odata.context": "/redfish/v1/$metadata#JsonSchemaFile.JsonSchemaFile",
    "@odata.id": "/redfish/v1/JsonSchemas/VCATEntry",
    "@odata.type": "#JsonSchemaFile.v1_0_2.JsonSchemaFile",
    "Name": "VCATEntry Schema File",
    "Schema": "#VCATEntry.VCATEntry",

Change-Id: I5ae6e3c655e44c82c4457515555bdb934dfb7763
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/static/redfish/v1/JsonSchemas/IPAddresses/IPAddresses.json b/static/redfish/v1/JsonSchemas/IPAddresses/IPAddresses.json
index 738ac27..735e08c 100644
--- a/static/redfish/v1/JsonSchemas/IPAddresses/IPAddresses.json
+++ b/static/redfish/v1/JsonSchemas/IPAddresses/IPAddresses.json
@@ -1,5 +1,5 @@
 {
-    "$id": "http://redfish.dmtf.org/schemas/v1/IPAddresses.v1_1_1.json",
+    "$id": "http://redfish.dmtf.org/schemas/v1/IPAddresses.v1_1_2.json",
     "$schema": "http://redfish.dmtf.org/schemas/v1/redfish-schema-v1.json",
     "copyright": "Copyright 2014-2019 DMTF. For the full DMTF copyright policy, see http://www.dmtf.org/about/policies/copyright",
     "definitions": {
@@ -306,7 +306,7 @@
         },
         "PrefixLength": {
             "maximum": 128,
-            "minimum": 1,
+            "minimum": 0,
             "type": "integer"
         },
         "SubnetMask": {
@@ -316,5 +316,5 @@
     },
     "owningEntity": "DMTF",
     "release": "2018.2",
-    "title": "#IPAddresses.v1_1_1"
+    "title": "#IPAddresses.v1_1_2"
 }
\ No newline at end of file