Add system IM keyword to PEL userdata0 section

Read the system IM keyword via dbus and add it to the PEL userdata0 section.

Signed-off-by: Ben Tyner <ben.tyner@ibm.com>
Change-Id: I6a45e0450928e49c8789cc2f93baad03cccf90c7
diff --git a/test/openpower-pels/mocks.hpp b/test/openpower-pels/mocks.hpp
index a6a2665..4196ee7 100644
--- a/test/openpower-pels/mocks.hpp
+++ b/test/openpower-pels/mocks.hpp
@@ -43,6 +43,7 @@
                 (const override));
     MOCK_METHOD(void, setFunctional, (const std::string&, bool),
                 (const override));
+    MOCK_METHOD(std::vector<uint8_t>, getSystemIMKeyword, (), (const override));
 
     void changeHostState(bool newState)
     {