Add Information for Validating a Claim (#2)

jsonschema is a standards-based tool used to verify a JSON input file
against a given schema.  This change involves documentation to describe
how to validate a claim.  A standard, off the shelf tool was preferred
to keep this task simple.

Signed-off-by: Ryan Goulding <[email protected]>
Issue-Id: CTONET-547

README.md

@@ -10,3 +10,34 @@ A claim contains:
 * All test configurations used by tests.
 * All tests run, and their respective results.
 * An end time for the claim evaluation.
+
+## Validating a claim
+
+### Requirements
+
+[`jsonschema`](https://python-jsonschema.readthedocs.io/en/stable/) must be installed and made available in `$PATH`.
+
+In order to install `jsonschema`, issue the following command:
+
+```shell script
+> pip3 install jsonschema
+```
+
+### Running the validation utility
+
+In order to validate a given schema, issue the following command:
+
+```shell script
+> jsonschema -i <path_to_claim_file> ./claim-schema.json
+```
+
+For a successful validation of the input claim, one should expect no output and a `0` exit code.
+
+```shell script
+> jsonschema -i ./sample.json ./claim-schema.json
+> echo $?
+0
+> 
+```
+
+If the claim does not adhere to the schema, `jsconschema` outputs an appropriate error message describing the issue.

claim-schema.json

@@ -51,4 +51,4 @@
       ]
     }
   }
-}
+}