Rename rde_common to bej_common

bej_common.h is a more consistant name than rde_common.h.

Also this repo only contains code related to BEJ encoding and decoding.
Therefore this change removes the rde related structs defind in the
bej_common.h. Those structs should be defined somewhere else (libpldm).

Signed-off-by: Kasun Athukorala <kasunath@google.com>
Change-Id: Ic296ece11efc0967366e197a8609c3c88c325610
diff --git a/test/bej_dictionary_test.cpp b/test/bej_dictionary_test.cpp
index 0ca9361..0591f7d 100644
--- a/test/bej_dictionary_test.cpp
+++ b/test/bej_dictionary_test.cpp
@@ -8,7 +8,7 @@
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
-namespace rde
+namespace libbej
 {
 
 /**
@@ -104,4 +104,4 @@
                 bejErrorInvalidPropertyOffset);
 }
 
-} // namespace rde
+} // namespace libbej