Use Travis' internal apt-addon

.travis.yml

@@ -9,6 +9,12 @@ cache:
    - gradle-cache
    - netbeans
    - jdks/local
+   
+addons:
+  apt:
+    packages:
+    - p7zip-full
+
 
 # branches:
 #   only:

jdks/download-jdks.sh

@@ -196,9 +196,9 @@ do
     fi
 done
 
-cd local/$jdk_version-$jdk_build_version
-install_seven_zip
-cd ../../
+#cd local/$jdk_version-$jdk_build_version
+#install_seven_zip # see travis' apt addon
+#cd ../../
 unpack_mac_jdk
 build_mac_jdk
 unpack_windows windows-i586