Support for per host User config

Related-Bug: PROD-17770
Change-Id: I7d12cf6914abf019ed0465484fb5ecb3ece77b22
diff --git a/openssh/files/ssh_config b/openssh/files/ssh_config
index 104214f..3e59eae 100644
--- a/openssh/files/ssh_config
+++ b/openssh/files/ssh_config
@@ -57,6 +57,9 @@
     {%- if cfg.identityfile is defined %}
     IdentityFile {{ cfg.identityfile }}
     {%- endif %}
+    {%- if cfg.username is defined %}
+    User {{ cfg.username }}
+    {%- endif %}
 {%- endmacro %}
 
 {%- if user_name is not defined %}