` OS_SymbolLookup` reports error if symbol is not found

[ivanperez-keera]

Calling OS_SymbolLookup (which calls OS_GenericSymbolLookup_Impl) prints error messages if the symbol is not found.

This is causing the lookup of dynamically loaded modules in SBN to throw several error messages even when the behavior is absolutely normal:

OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./core-cpu1: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/sbn.so: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/cfe_assert.so: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/sample_lib.so: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/sample_app.so: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/ci_lab.so: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/to_lab.so: undefined symbol: SBN_UDP_Ops
OS_GenericSymbolLookup_Impl():114:Error: SBN_UDP_Ops: ./cf/sch_lab.so: undefined symbol: SBN_UDP_Ops

Calling this function should not report an message labelled as error if the behavior is not really considered an error.

https://github.com/nasa/SBN/blob/7c37a493ecfb0677cbc47407e20d7ef62c48bb2b/fsw/src/sbn_app.c#L995

[ivanperez-keera]

Tagging @jphickey for awareness.