This silences the SAL_WARN_IF like
warn:formula.core:6944:1:formula/source/core/api/FormulaCompiler.cxx:625:
OpCodeMap::putOpCode: reusing OpCode 161,
replacing '_xlfn.ORG.OPENOFFICE.ERRORTYPE' with 'ERRORTYPE'
in English map 0x1018000

that occurred during the first load of OOXML .xlsx documents since the
old bad entries were added with commit
89c4a691

In fact the direction opcode -> string was replaced, which it should had
not. That specific mapping is only used though when loading msoxl
namespace formulas from ODF.

Also, the replacement of parameter separator and array column and row
separator worked merely by chance, depending on in which order the
entries where inserted to the hash map. Fixed along as it popped up with
the new handling.

Change-Id: I88017a8b38ccc30874c3dca7d78f0fa47a77a36f