Add 'factoryreset' cli (#892)

* add 'factoryreset' cli to delete all stored settings and then reset

* use 'factoryreset' in THCI reset API to ensure that there is no pre-settings in DUT before running any test

src/cli/README.md

@@ -21,6 +21,7 @@ OpenThread test scripts use the CLI to execute test cases.
 * [eui64](#eui64)
 * [extaddr](#extaddr)
 * [extpanid](#extpanid)
+* [factoryreset](#factoryreset)
 * [hashmacaddr](#hashmacaddr)
 * [ifconfig](#ifconfig)
 * [ipaddr](#ipaddr)
@@ -711,6 +712,13 @@ Set the Thread Extended PAN ID value.
 Done
 ```
 
+### factoryreset
+Delete all stored settings, and signal a platform reset.
+
+```bash
+> factoryreset
+```
+
 ### hashmacaddr
 
 Get the HashMac address.

src/cli/cli.cpp

@@ -87,6 +87,7 @@ const struct Command Interpreter::sCommands[] =
 #endif
     { "extaddr", &Interpreter::ProcessExtAddress },
     { "extpanid", &Interpreter::ProcessExtPanId },
+    { "factoryreset", &Interpreter::ProcessFactoryReset },
     { "hashmacaddr", &Interpreter::ProcessHashMacAddress },
     { "ifconfig", &Interpreter::ProcessIfconfig },
     { "ipaddr", &Interpreter::ProcessIpAddr },
@@ -650,6 +651,13 @@ exit:
     AppendResult(error);
 }
 
+void Interpreter::ProcessFactoryReset(int argc, char *argv[])
+{
+    otFactoryReset(mInstance);
+    (void)argc;
+    (void)argv;
+}
+
 void Interpreter::ProcessHashMacAddress(int argc, char *argv[])
 {
     ThreadError error = kThreadError_None;

src/cli/cli.hpp

@@ -160,6 +160,7 @@ private:
 #endif
     void ProcessExtAddress(int argc, char *argv[]);
     void ProcessExtPanId(int argc, char *argv[]);
+    void ProcessFactoryReset(int argc, char *argv[]);
     void ProcessHashMacAddress(int argc, char *argv[]);
     void ProcessIfconfig(int argc, char *argv[]);
     void ProcessIpAddr(int argc, char *argv[]);