Merge pull request #4251 from ros-infrastructure/gazebo7

[Gazebo] version bump for v7

library/gazebo

@@ -60,12 +60,12 @@ Directory: gazebo/6/ubuntu/trusty/libgazebo6
 
 Tags: gzserver7, gzserver7-xenial
 Architectures: amd64
-GitCommit: 243636dc8ae55916e57f5032942eed93e3fdad0a
+GitCommit: 707b516cdf546995718d96dcf3d41e2e4969c0ec
 Directory: gazebo/7/ubuntu/xenial/gzserver7
 
 Tags: libgazebo7, libgazebo7-xenial
 Architectures: amd64
-GitCommit: 243636dc8ae55916e57f5032942eed93e3fdad0a
+GitCommit: 707b516cdf546995718d96dcf3d41e2e4969c0ec
 Directory: gazebo/7/ubuntu/xenial/libgazebo7