[cpp-rest] better handling of property name with special characters

[kesheshyan]

Issue:

#12289

Fix for cpp-rest-sdk-client generator producing uncompilable code if there is a "-" (or other characters like a space etc.) in a property name of an object.

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  @ravinikam, @stkrwork, @etherealjoy, @MartinDelille, @muttleyxd

[wing328]

Tested locally with updated samples and the result is good:

/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
[ 83%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Pet.cpp.o
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
[ 88%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Tag.cpp.o
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
[ 94%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/User.cpp.o
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
[100%] Linking CXX static library libCppRestPetstoreClient.a
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
[100%] Built target CppRestPetstoreClient
/usr/bin/cmake: /usr/local/lib/libcurl.so.4: no version information available (required by /usr/bin/cmake)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  03:39 min
[INFO] Finished at: 2022-05-03T11:22:43+08:00
[INFO] ------------------------------------------------------------------------

Thanks for the fix.

[wing328]

FYI. Samples updated via 1e48c95