Enable Travis Debian 7 (#417)

* Download and install CMake 3.10 for Debian 7
* Install procps on Debian 7 container

.travis.yml

@@ -6,7 +6,8 @@ env:
   matrix:
     - OS_TYPE=debian8 CMAKE_BUILD_TYPE=DEBUG
     - OS_TYPE=debian8 CMAKE_BUILD_TYPE=RELEASE
-#    - OS_TYPE=debian7 CMAKE_BUILD_TYPE=RELEASE
+    - OS_TYPE=debian7 CMAKE_BUILD_TYPE=RELEASE
+    - OS_TYPE=debian7 CMAKE_BUILD_TYPE=DEBUG
 #    - OS_TYPE=win32
 # etc
 

.travis/debian7/Dockerfile

@@ -8,9 +8,19 @@ MAINTAINER TANGO Controls team <tango@esrf.fr>
 
 RUN apt-get update && apt-get install -y apt-utils
 
-RUN apt-get update && apt-get install -y build-essential cmake
+RUN apt-get install -y build-essential
 
-RUN apt-get update && apt-get install -y omniidl libomniorb4-dev libcos4-dev libomnithread3-dev libzmq3-dev
+RUN apt-get install -y procps
+
+RUN apt-get install -y wget
+
+RUN wget --no-check-certificate https://cmake.org/files/v3.10/cmake-3.10.0-Linux-x86_64.sh -O /tmp/cmake-install.sh
+
+RUN chmod +x /tmp/cmake-install.sh
+
+RUN /tmp/cmake-install.sh --skip-license --exclude-subdir
+
+RUN apt-get install -y omniidl libomniorb4-dev libcos4-dev libomnithread3-dev libzmq3-dev
 
 RUN groupadd -g "$APP_GID" tango