[CAPI] Modify model_compile_with_single_param() and ml_train_model_run_with_single_pa...

[CAPI] Modify model_compile_with_single_param() and ml_train_model_run_with_single_param()

Modified the internal APIs created as a C# va_list issue since capi can receive
single string in the form "key=value | key=value" and all objects have loadProperties
in setProperty which can split it with '|'.
so, the original code was reverted and added new code related call capi directly.

**Self evaluation:**
1. Build test:   [X]Passed [ ]Failed [ ]Skipped
2. Run test:     [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: Hyunil <hyunil46.park@samsung.com>