bmc: move away from blobs namespace

The blobs namespace is really owned by phosphor-ipmi-blobs.  Move all
phosphor-ipmi-flash objects into ipmi_flash namespace.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I51b721ad4f3cdc4cc43846c942967ed2e5f16589
diff --git a/test/firmware_createhandler_unittest.cpp b/test/firmware_createhandler_unittest.cpp
index 4821ffa..10e8410 100644
--- a/test/firmware_createhandler_unittest.cpp
+++ b/test/firmware_createhandler_unittest.cpp
@@ -6,7 +6,7 @@
 
 #include <gtest/gtest.h>
 
-namespace blobs
+namespace ipmi_flash
 {
 using ::testing::Return;
 using ::testing::StrEq;
@@ -37,4 +37,4 @@
     EXPECT_FALSE(handler == nullptr);
 }
 
-} // namespace blobs
+} // namespace ipmi_flash