move sensors into ipmi::sensor namespace

The object was left in the global namespace, but the type was in the
ipmi::sensor namespace.  Move the object into the namespace.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I88e46da4abda220d3b6fcc2ea64b8ef0decb0dc3
diff --git a/storagehandler.cpp b/storagehandler.cpp
index 0932f72..96d3d54 100644
--- a/storagehandler.cpp
+++ b/storagehandler.cpp
@@ -27,7 +27,14 @@
 void register_netfn_storage_functions() __attribute__((constructor));
 
 unsigned int g_sel_time = 0xFFFFFFFF;
-extern const ipmi::sensor::IdInfoMap sensors;
+namespace ipmi
+{
+namespace sensor
+{
+extern const IdInfoMap sensors;
+} // namespace sensor
+} // namespace ipmi
+
 extern const FruMap frus;
 constexpr uint8_t eventDataSize = 3;
 namespace
@@ -725,7 +732,7 @@
     constexpr uint32_t deletionTimestamp = 0x0;
     constexpr uint8_t operationSupport = 0;
 
-    uint16_t records = frus.size() + sensors.size();
+    uint16_t records = frus.size() + ipmi::sensor::sensors.size();
 
     return ipmi::responseSuccess(sdrVersion, records, freeSpace,
                                  additionTimestamp, deletionTimestamp,