Reverting function py_sanity_ydktest_test in tests.sh
Reverting function py_sanity_ydktest_test in tests.sh

CiscoDevNet/ydk-gen,CiscoDevNet/ydk-gen,CiscoDevNet/ydk-gen,CiscoDevNet/ydk-gen,CiscoDevNet/ydk-gen,CiscoDevNet/ydk-gen