fix bug when enable gpu unit test on docker

Dockerfile

@@ -26,7 +26,7 @@ RUN apt-get update && \
     apt-get install -y git python-pip python-dev openssh-server bison && \
     apt-get install -y wget unzip tar xz-utils bzip2 gzip coreutils && \
     apt-get install -y curl sed grep graphviz libjpeg-dev zlib1g-dev && \
-    apt-get install -y python-numpy python-matplotlib gcc g++ gfortran && \
+    apt-get install -y python-numpy python-matplotlib gcc g++ liblapack-dev liblapacke-dev && \
     apt-get install -y automake locales clang-format-3.8 swig doxygen && \
     apt-get clean -y
 

paddle/scripts/docker/build.sh

@@ -34,7 +34,8 @@ cmake .. \
       -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
 make -j `nproc`
 if [ ${WITH_TESTING:-OFF} == "ON" ] && [ ${RUN_TEST:-OFF} == "ON" ] ; then
-    ctest -V 
+    pip uninstall -y py-paddle paddle
+    ctest -V
 fi
 make install
 pip install /usr/local/opt/paddle/share/wheels/*.whl