installaing onapsdk is not needed
it is installed as dependency of pythonsdk-tests through its requirements.txt
file
Issue-ID: INT-1771
Signed-off-by: mrichomme <morgan.richomme@orange.com>
Change-Id: I7810ded9eabd0958d7141a6d062bac969a7be5af
     apk add --no-cache --virtual .build-deps libffi-dev python3-dev \
         gcc openssl-dev linux-headers musl-dev && \
     pip3 install --upgrade pip && \
-    pip3 install --no-cache-dir \
-        git+https://gitlab.com/Orange-OpenSource/lfn/onap/python-onapsdk.git@develop && \
     pip3 install --no-cache-dir \
         git+https://gerrit.onap.org/r/testsuite/pythonsdk-tests@$ONAP_TESTS_TAG && \
     apk del .build-deps