utl::TempFile::CreateTempName pParent is unused

Change-Id: Ide12ea21104af678dc541ed0e83970e7a2f5e694
Elide utl::TempFile_Impl

Change-Id: I8f14cd351c17abaa9d48144cdf8325afc250787b
Remove nonsensical code

...introduced with 2d8c990f8790be43cf4dda4bc871a917b9dcc974 "INTEGRATION:
CWS reportdesign01: #i79214# new method to allow to start not with zero."

Change-Id: Id141b2913ceb47c0c54f4449bdcdf5130c6f355b
Consolidate CreateTempName_Impl and lcl_createName

Change-Id: I4dbb917a6d9343f797859a2f24fa1d92b26a51eb