CI: use docker images from gbonnefille registry

.gitlab-ci.yml

 variables:
   DOCKER_DRIVER: overlay2
+  GIT_DEPTH: "3"
 
 stages:
   - build
@@ -17,13 +18,13 @@ stages:
 native-build:
   extends: .general
   stage: build
-  image: registry.orfeo-toolbox.org/orfeotoolbox/otb:ubuntu-18.04-gcc
+  image: registry.orfeo-toolbox.org/gbonnefille/otb-build-env/otb-ubuntu-native:18.04
   script:
     - ctest -VV -S CI/main_ci.cmake -DIMAGE_NAME:string=ubuntu-18.04-gcc
 
 shark-build:
   extends: .general
   stage: build
-  image: registry.orfeo-toolbox.org/orfeotoolbox/otb:ubuntu-18.04-gcc-shark-3.1.4
+  image: registry.orfeo-toolbox.org/gbonnefille/otb-build-env/otb-ubuntu-shark:18.04
   script:
-    - ctest -VV -S CI/main_ci.cmake -DIMAGE_NAME:string=ubuntu-18.04-gcc-shark-3.1.4
\ No newline at end of file
+    - ctest -VV -S CI/main_ci.cmake -DIMAGE_NAME:string=ubuntu-18.04-gcc-shark-3.1.4

CI/configure_option.cmake

@@ -48,7 +48,7 @@ OTB_USE_OPENGL:BOOL=ON
 OTB_USE_OPENMP:BOOL=ON
 OTB_USE_QT:BOOL=ON
 OTB_USE_QWT:BOOL=ON
-OTB_USE_SHARK:BOOL=$ENV{OTB_USESHARK}
+OTB_USE_SHARK:BOOL=ON
 OTB_USE_SIFTFAST:BOOL=ON
 OTB_USE_SPTW:BOOL=ON
 OTB_USE_SSE_FLAGS:BOOL=ON")

CI/ubuntu-18.04-gcc.cmake

@@ -21,4 +21,5 @@
 # Configuration options for ubuntu-18.04-gcc
 
 set(site_option
-"opencv_INCLUDE_DIR:PATH=/usr/include")
+"opencv_INCLUDE_DIR:PATH=/usr/include
+OTB_USE_SHARK:BOOL=OFF")