juniper_junos_software does not throw appropriate error messages during space issues.

[sahanaspc]

When there is insufficient space left on the device, juniper_junos_software module needs to return a correct error when the upgrade procedure tries to untar the image.
Right now it just throws "Unable to install the software" when the error message should be something like "Unable to install software due to insufficient storage on the device"

[rahkumar651991]

The failure message is modified and much detailed response is now expected.
The changes can be seen on ansible roles 2.4.0