ros_comm: 1.11.6-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `ros_comm` to `1.11.6-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.10`
- previous version for package: `1.11.5-0`

## message_filters

- No changes

## ros_comm

- No changes

## rosbag

```
* fix rosbag record prefix (#449 <https://github.com/ros/ros_comm/issues/449>)
```

## rosbag_storage

- No changes

## rosconsole

- No changes

## roscpp

```
* check ROS_HOSTNAME for localhost / ROS_IP for 127./::1 and prevent connections from other hosts in that case (#452 <https://github.com/ros/ros_comm/issues/452>)_
```

## rosgraph

- No changes

## roslaunch

```
* fix printing of non-ascii roslaunch parameters (#454 <https://github.com/ros/ros_comm/issues/454>)
* add respawn_delay attribute to node tag in roslaunch (#446 <https://github.com/ros/ros_comm/issues/446>)
* write traceback for exceptions in roslaunch to log file
```

## roslz4

```
* fix finding specific version of PythonLibs with CMake 3
```

## rosmaster

- No changes

## rosmsg

- No changes

## rosnode

- No changes

## rosout

- No changes

## rosparam

- No changes

## rospy

```
* make MasterProxy thread-safe (#459 <https://github.com/ros/ros_comm/issues/459>)
* check ROS_HOSTNAME for localhost / ROS_IP for 127./::1 and prevent connections from other hosts in that case (#452 <https://github.com/ros/ros_comm/issues/452>)_
```

## rosservice

- No changes

## rostest

```
* resolving naming conflicts when multiple test are added with arguments (#462 <https://github.com/ros/ros_comm/issues/462>)
```

## rostopic

- No changes

## roswtf

- No changes

## topic_tools

- No changes

## xmlrpcpp

- No changes