No possibility to retry plugin installation after network failure

[Karl-Philipp Richter]

If the plugin installation in GUI mode fails due to `error: Network connection not detected.`, `hplip-3.16.11.run` simply continues the installation, prints `Done.` and terminates the setup. The complete setup has to be repeated and if the connection fails after the start of the setup one can be occupied with trial-error installation for hours.

[Unit](https://en.wikipedia.org/wiki/Unit_testing) and [integration](https://en.wikipedia.org/wiki/Integration_testing) test provide a very helpful way to detect trivial and obvious issues/errors like this one before releasing software to end users. It's quite unlikely to create average quality software without them and the use case of this issue/error should be covered by both.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: hplip (not installed)
ProcVersionSignature: Ubuntu 4.8.0-28.30-generic 4.8.6
Uname: Linux 4.8.0-28-generic x86_64
NonfreeKernelModules: openafs zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Dec 4 01:14:42 2016
InstallationDate: Installed on 2015-12-12 (357 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: hplip
UpgradeStatus: Upgraded to yakkety on 2016-10-17 (47 days ago)

[gf (gf-interlinks-deactivatedaccount)]

Hello again Karl-Philipp,
Thank you for submitting this other bug and reporting a problem with upgrading hplip in Dec 2016. Ubuntu and hplip have been updated since then.

Could you confirm that this is no longer a problem and that we can close the ticket?
If it is still a problem, are you still interested in finding a solution to this bug?
If you are, could you let us know and, in the current version, could you run the following (only once):
apport-collect 1647111
and upload the updated logs and and any other logs that are relevant for this particular issue.

Thank you again for helping make Ubuntu and hplip better.
G
[Ubuntu Bug Squad volunteer triager]

[Launchpad Janitor (janitor)]

[Expired for hplip (Ubuntu) because there has been no activity for 60 days.]