OpenBMC Test architecture documentation

Change-Id: I570517ffd4f7584d487fb91dbf5d774b605b11ba
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
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+### OpenBMC Test Architecture Model
+
+### OpenBMC Supported Interfaces
+
+```
+
+                         ---------
+                        | OpenBMC |
+                         ---------
+                             |
+      -----------------------------------------------
+      |                      |                      |
+   ---------            -------------             ------
+  | Redfish |          | Legacy REST |           | IPMI |
+   ---------            -------------             ------
+      |                      |
+      -----------------------
+                 |
+            -------------
+           | BMC Web GUI |
+            -------------
+
+```
+
+NOTE: Legacy REST will be deprecated at some point and therefore no longer supported.
+
+
+### OpenBMC Test Method Supports
+
+```
+                                 ----------
+                                | Test BMC |
+                                 ----------
+                                     |
+         -----------------------------------------------------------
+         |                           |                             |
+     -----------               -----------------              -----------
+    | Boot Test |             | Functional Test |            | Host Test |
+     -----------               -----------------              ------------
+         |                           |                             |
+    ******************   *****************************    ********************
+    | Interfaces:    |   | Interfaces:               |    | Interfaces:      |
+    |   - REST/IPMI  |   |   - REST/IPMI/GUI         |    |   - REST/Tools   |
+    | Power on       |   | Minimal Boot Test         |    | HTX boot runs    |
+    | Power off      |   | Interfaces Functions      |    | Host IO/OS test  |
+    | BMC/Host reset |   | System Functionality      |    | System RAS       |
+    ******************   *****************************    ********************
+
+```