PEL: Save BMC Version ID in UserData section

When creating a PEL, save the VERSION_ID value from the /etc/os-release
file in the UserData section that keeps useful system information.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I6d9008b15c5347239bf8c21ef79219d3b6ee08e6
diff --git a/test/openpower-pels/mocks.hpp b/test/openpower-pels/mocks.hpp
index 5bec579..e00e006 100644
--- a/test/openpower-pels/mocks.hpp
+++ b/test/openpower-pels/mocks.hpp
@@ -23,6 +23,7 @@
     MOCK_METHOD(std::string, getMachineSerialNumber, (), (const override));
     MOCK_METHOD(std::string, getServerFWVersion, (), (const override));
     MOCK_METHOD(std::string, getBMCFWVersion, (), (const override));
+    MOCK_METHOD(std::string, getBMCFWVersionID, (), (const override));
 
     void changeHostState(bool newState)
     {