(pip) Update before installing pip

.gitlab-ci.yml

 default:
-    image: pdechamps/blaster:v1
+    image: rboman/waves-py3:2020.3
     before_script:
+        - apt-get update -y
+        - apt-get install -y python3-pip
+        - python3 -m pip install scipy==1.11.3 --user
         - source /opt/intel/mkl/bin/mklvars.sh intel64
         - source /opt/intel/tbb/bin/tbbvars.sh intel64
         - echo $(nproc)
         - printenv | sort
+        - apt-get install pip
 
 .global_tag: &global_tag_def
     tags:
@@ -29,7 +33,7 @@ build:
         - rm -rf build workspace
         - mkdir build
         - cd build
-        - cmake -DUSE_MKL=False -Wno-dev ..
+        - cmake -Wno-dev ..
         - make -j 8
     artifacts:
         paths: