Enabling opportunity to store in ONOS Flow Rules already installed on the device. This option should be activated via following Cli command: 'cfg set org.onosproject.net.flow.impl.FlowRuleManager allowExtraneousRules true'.

Change-Id: Ie603bff643d6d2aa16002c16861628e1417bd84d
(cherry picked from commit 3f56eb1ebd4bfde1eb364c193dc6e227aadf99e5)
diff --git a/core/net/src/main/java/org/onosproject/net/OsgiPropertyConstants.java b/core/net/src/main/java/org/onosproject/net/OsgiPropertyConstants.java
index bcf9d2f..fe6ac63 100644
--- a/core/net/src/main/java/org/onosproject/net/OsgiPropertyConstants.java
+++ b/core/net/src/main/java/org/onosproject/net/OsgiPropertyConstants.java
@@ -38,6 +38,9 @@
     public static final String ALLOW_EXTRANEOUS_RULES = "allowExtraneousRules";
     public static final boolean ALLOW_EXTRANEOUS_RULES_DEFAULT = false;
 
+    public static final String IMPORT_EXTRANEOUS_RULES = "importExtraneousRules";
+    public static final boolean IMPORT_EXTRANEOUS_RULES_DEFAULT = false;
+
     public static final String PURGE_ON_DISCONNECTION = "purgeOnDisconnection";
     public static final boolean PURGE_ON_DISCONNECTION_DEFAULT = false;