hide python syntax errors in host_get_info
hide python syntax errors in host_get_info

If the backend of zvmclient not work correctly, invalid memory
string would be return to sdk. Type error, index error or other
python syntax errors might be raised.

In current implement, sdk will catch those execptions then re-raise
as sdk internal error and print original error in sdk internal
error. This makes user confused.

So hide python syntax errors in this case.

Fix bug/1710581

Change-Id: If20768654282410d12443eecf756f00f0e2134dd

mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk