util: create util object for bmc and tool

Create a common util object for the BMC library and host tool.  Place in
blobs namespace favoring BMC.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I036fd65d924c65fcfa71aba5cd76275a2941ff14
diff --git a/test/firmware_handler_unittest.cpp b/test/firmware_handler_unittest.cpp
index 1457a3b..020d7ff 100644
--- a/test/firmware_handler_unittest.cpp
+++ b/test/firmware_handler_unittest.cpp
@@ -1,5 +1,6 @@
 #include "firmware_handler.hpp"
 #include "image_mock.hpp"
+#include "util.hpp"
 
 #include <algorithm>
 #include <sdbusplus/test/sdbus_mock.hpp>
@@ -28,7 +29,7 @@
     ImageHandlerMock imageMock;
 
     std::vector<HandlerPack> blobs = {
-        {FirmwareBlobHandler::hashBlobID, &imageMock},
+        {hashBlobId, &imageMock},
         {"asdf", &imageMock},
     };
 
@@ -58,16 +59,14 @@
         std::move(bus_mock), blobs, data);
     EXPECT_EQ(handler, nullptr);
 
-    blobs.push_back({FirmwareBlobHandler::hashBlobID, &imageMock});
+    blobs.push_back({hashBlobId, &imageMock});
 
     handler = FirmwareBlobHandler::CreateFirmwareBlobHandler(
         std::move(bus_mock), blobs, data);
     auto result = handler->getBlobIds();
     EXPECT_EQ(3, result.size());
     EXPECT_EQ(3, std::count(result.begin(), result.end(), "asdf") +
-                     std::count(result.begin(), result.end(),
-                                FirmwareBlobHandler::hashBlobID) +
-                     std::count(result.begin(), result.end(),
-                                FirmwareBlobHandler::verifyBlobID));
+                     std::count(result.begin(), result.end(), hashBlobId) +
+                     std::count(result.begin(), result.end(), verifyBlobId));
 }
 } // namespace blobs