CELIX-282: Fixed travis setup

.travis.yml

@@ -9,16 +9,22 @@ compiler:
     - clang
 
 before_install:
-  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo apt-get -qq update && sudo apt-get install -y uuid-dev libjansson-dev libxml2-dev lcov libffi-dev; fi
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update && brew install lcov libffi jansson && brew link --force libffi; fi
+  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo apt-get -qq update && sudo apt-get install -y uuid-dev libxml2-dev lcov libffi-dev; fi
+  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update && brew install lcov libffi && brew link --force libffi; fi
 
 before_script:
     - wget https://github.com/cpputest/cpputest.github.io/blob/master/releases/cpputest-3.7.1.tar.gz?raw=true -O /tmp/cpputest.tar.gz
     - tar -xzvf /tmp/cpputest.tar.gz -C /tmp
     - if [ "$CC" = "clang" ]; then export CXX="clang++"; fi && cd /tmp/cpputest-3.7.1 && ./configure --prefix=/usr && make && sudo make install && cd -
     - cd /tmp/cpputest-3.7.1 && ./configure --prefix=/usr && make && sudo make install && cd -
+    - git clone https://github.com/akheron/jansson.git jansson-build
+    - cd jansson-build && git checkout 2.7
+    - cmake -DJANSSON_BUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX=/usr . && make
+    - sudo make install
+    - cd -
     - mkdir build install
 
+
 script:
      # the following setup is broken:
      # RSA_DISCOVERY_SHM is only working on linux, but both compilers (see CELIX-277)