Integrate doctor-test package

Integrate doctor-test package

It updates tescases.yaml as run.sh is located in $PATH.
repo_doctor is removed as it's now useless.

It must be noted that doctor-test imports modules fom a relative path
which can break the integration. Pylint warms them (W0403) [1].

[1] https://docs.pylint.org/en/1.6.0/features.html

Co-Authored-By: Cédric Ollivier <cedric.ollivier@orange.com>
Change-Id: Icd3071a8e371048370bd3e07e08b6b52ddb35c13
Depends-On: I2091cfe4751640bf83d77e1fdd713af1e31fa89d
Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>