add handler logic to handle SysEntityName

Add handler logic to handler for SysEntityName such that it splits the
true IPMI processing from the business logic.

Tested: Only ran unit-tests (added new ones).
Change-Id: I6d672a80f85843ff98c2c7e5daf4689932ff96f9
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/Makefile.am b/test/Makefile.am
index 04b6836..0243d44 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -34,3 +34,7 @@
 check_PROGRAMS += psu_unittest
 psu_unittest_SOURCES = psu_unittest.cpp
 psu_unittest_LDADD = $(top_builddir)/libsyscmds_common.la
+
+check_PROGRAMS += entity_unittest
+entity_unittest_SOURCES = entity_unittest.cpp
+entity_unittest_LDADD = $(top_builddir)/libsyscmds_common.la