Vagrant fixes (#3598)

* Qt5.5.1 link corrected.

* Qt5.5.1 tarball saves to project's root directory
since qt_deps_tarball used to have prefix of /vagrant.

* Add requests to update machine setup for both Travis and Vagrant

* Vagrant: use config variable in place of static string

* Vagrant: init and update submodules

.travis.yml

+# if you update this file, please consider updating Vagrantfile too
+
 language: cpp
 
 git:

.vagrantconfig.yml

 configs:
     dev:
-        'qt_deps_tarball': '/vagrant/Qt5.5.1-linux.tar.bz2'
+        'qt_deps_tarball': 'Qt5.5.1-linux.tar.bz2'
         'qt_deps_unpack_parent_dir': '/tmp'
 
         'qt_deps_unpack_dir': '/tmp/Qt'
@@ -9,6 +9,8 @@ configs:
         'qt_deps_plugins_unpack_dir': '/tmp/Qt/5.5/gcc_64/plugins'
         'qt_deps_qml_unpack_dir': '/tmp/Qt/5.5/gcc_64/qml'
 
+        'project_root_dir': '/vagrant'
+
         'qt_deps_dir': '/vagrant/shadow-build/release/Qt'
         'qt_deps_bin_dir': '/vagrant/shadow-build/release/Qt/bin'
         'qt_deps_lib_dir': '/vagrant/shadow-build/release/Qt/libs'
@@ -18,4 +20,4 @@ configs:
         'spec': 'linux-g++-64'
         'shadow_build_dir': '/vagrant/shadow-build'
         'pro': '/vagrant/qgroundcontrol.pro'
-        'deps_url': 'https://s3-us-west-2.amazonaws.com/qgroundcontrol/dependencies'
+        'deps_url': 'https://s3-us-west-2.amazonaws.com/qgroundcontrol/dependencies/Qt5.5.1-linux.tar.bz2'

Vagrantfile

 # -*- mode: ruby -*-
 # vi: set ft=ruby :
 
+# if you update this file, please consider updating .travis.yml too
+
 require 'yaml'
 
 current_dir    = File.dirname(File.expand_path(__FILE__))
@@ -24,14 +26,18 @@ Vagrant.configure(2) do |config|
      sudo apt-get dist-upgrade -y
      sudo apt-get install -y git build-essential
      sudo apt-get install -y espeak libespeak-dev libudev-dev libsdl1.2-dev
-     sudo apt-get install -y doxygen 
+     sudo apt-get install -y doxygen
      sudo apt-get install -y gstreamer1.0* libgstreamer1.0*
 
      # taken from travis.yml
-     su - vagrant -c 'wget --continue -q %{deps_url}/%{qt_deps_tarball}'
+     echo 'Initialising submodules'
+     su - vagrant -c 'cd %{project_root_dir}; git submodule init && git submodule update'
+
+     echo 'Saving %{qt_deps_tarball} from %{deps_url} to %{project_root_dir}'
+     su - vagrant -c 'wget --continue -q %{deps_url} -P %{project_root_dir}'
      su - vagrant -c 'rm -rf %{qt_deps_unpack_dir}'
      su - vagrant -c 'mkdir -p %{qt_deps_unpack_parent_dir}'
-     su - vagrant -c 'tar jxf "%{qt_deps_tarball}" -C  %{qt_deps_unpack_parent_dir}'
+     su - vagrant -c 'cd %{project_root_dir}; tar jxf "%{qt_deps_tarball}" -C  %{qt_deps_unpack_parent_dir}'
      su - vagrant -c 'rm -rf %{shadow_build_dir}'
      su - vagrant -c 'mkdir -p %{shadow_build_dir}'
      su - vagrant -c "cd %{shadow_build_dir}; LD_LIBRARY_PATH=%{qt_deps_lib_unpack_dir} PATH=%{qt_deps_bin_unpack_dir}:\$PATH qmake -r %{pro} -spec %{spec}"
@@ -52,6 +58,7 @@ Vagrant.configure(2) do |config|
     :spec => yaml_config['spec'],
     :deps_url => yaml_config['deps_url'],
 
+    :project_root_dir => yaml_config['project_root_dir'],
     :qt_deps_unpack_parent_dir => yaml_config['qt_deps_unpack_parent_dir'],
     :qt_deps_unpack_dir => yaml_config['qt_deps_unpack_dir'],
     :qt_deps_bin_unpack_dir => yaml_config['qt_deps_bin_unpack_dir'],