Merge pull request #502 from stackhpc/add-mathieu

Add Mathieu to Platforms and Batch teams

Author: sjpb

terraform/github/terraform.tfvars.json

@@ -143,6 +143,7 @@
           "elelaysh",
           "jovial",
           "m-bull",
+          "mgrzybek",
           "sjpb",
           "stackhpc-ci"
         ]
@@ -243,6 +244,7 @@
           "darmach",
           "GregWhiteyBialas",
           "m-bull",
+          "mgrzybek",
           "sjpb",
           "stackhpc-ci"
         ]