Add Hostname property errors

Hostname does not allow special characters while setting hostname
this commit adds InvalidArgument error to handle invalid hostnames

Change-Id: I2ecc92637364baebe9e845bd22099fcb9744c2f4
Signed-off-by: Ravi Teja <raviteja28031990@gmail.com>
diff --git a/yaml/xyz/openbmc_project/Network/SystemConfiguration.interface.yaml b/yaml/xyz/openbmc_project/Network/SystemConfiguration.interface.yaml
index a0a82c4..dccefac 100644
--- a/yaml/xyz/openbmc_project/Network/SystemConfiguration.interface.yaml
+++ b/yaml/xyz/openbmc_project/Network/SystemConfiguration.interface.yaml
@@ -5,3 +5,5 @@
       type: string
       description: >
           The value of this property shall be host name of the system.
+      errors:
+          - xyz.openbmc_project.Common.Error.InvalidArgument