TFTP errors

Created new errors, InternalFailure and
InvalidArgument, in Common.errors.yaml.
These errors are used in TFTP.interface.yaml.

Change-Id: I2aa3e7bf57b2562945efdd9efba19b4551a7c0b1
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/xyz/openbmc_project/Common.metadata.yaml b/xyz/openbmc_project/Common.metadata.yaml
index c4a651d..1c45f45 100644
--- a/xyz/openbmc_project/Common.metadata.yaml
+++ b/xyz/openbmc_project/Common.metadata.yaml
@@ -2,3 +2,9 @@
   meta:
     - str: "TIMEOUT_IN_MSEC=%llu"
       type: uint64
+- name: InvalidArgument
+  meta:
+    - str: "ARGUMENT_NAME=%s"
+      type: string
+    - str: "ARGUMENT_VALUE=%s"
+      type: string