[ONOS-8139]Private SSH Key File Path made configurable for passwordless netconf ssh connection

Change-Id: I3a3d991dcd2f458acad2cc98f10543b697440fb3
diff --git a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/OsgiPropertyConstants.java b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/OsgiPropertyConstants.java
index 6fcdcfd..cb15706 100644
--- a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/OsgiPropertyConstants.java
+++ b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/OsgiPropertyConstants.java
@@ -34,4 +34,7 @@
 
     public static final String SSH_LIBRARY = "sshLibrary";
     public static final String SSH_LIBRARY_DEFAULT = "apache-mina";
+
+    public static final String SSH_KEY_PATH = "sshKeyPath";
+    public static final String SSH_KEY_PATH_DEFAULT = "/root/.ssh/id_rsa";
 }