[LOAD][UNLOAD] Fix w*printf() format strings (#3319)

Also:
- Set ServiceName.MaximumLength.
- Fix MSVC warnings:
'...\load\load.c(19): warning C4267: '=': conversion from 'size_t' to 'USHORT', po

[LOAD][UNLOAD] Fix w*printf() format strings (#3319)

Also:
- Set ServiceName.MaximumLength.
- Fix MSVC warnings:
'...\load\load.c(19): warning C4267: '=': conversion from 'size_t' to 'USHORT', possible loss of data
'...\unload\unload.c(19): warning C4267: '=': conversion from 'size_t' to 'USHORT', possible loss of data'
'...\unload\unload.c(24): warning C4476: 'wprintf' : unknown type field character 'U' in format specifier'
'...\unload\unload.c(24): warning C4474: 'wprintf' : too many arguments passed for format string'

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[ROSAPPS] Remove applications from test directory
CORE-17097