travis: fix pgtest failure

[dev-zero]

Based on travis-ci/travis-ci#9011 it seems we
have to specify explicitly the dependency on the postgresql-dev package
by now.

[dev-zero]

ok, now pgtest is unable to start the postgresql server in time (timeout), and the timeout in pgtest is hardcoded to 5s

[DropD]

5 s should be ample time for postgres to start, there might be something preventing the server from starting.

[codecov-io]

Codecov Report

Merging #1726 into develop will increase coverage by 0.77%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1726      +/-   ##
===========================================
+ Coverage    56.39%   57.16%   +0.77%     
===========================================
  Files          275      275              
  Lines        33912    33912              
===========================================
+ Hits         19123    19386     +263     
+ Misses       14789    14526     -263

Impacted Files	Coverage Δ
aiida/backends/djsite/db/models.py	75.97% <0%> (+0.88%)	⬆️
aiida/orm/implementation/django/computer.py	80.85% <0%> (+1.59%)	⬆️
aiida/cmdline/verdilib.py	70.58% <0%> (+2.1%)	⬆️
aiida/control/postgres.py	90.9% <0%> (+2.59%)	⬆️
aiida/common/additions/config_migrations/_utils.py	97.22% <0%> (+2.77%)	⬆️
.../common/additions/config_migrations/_migrations.py	100% <0%> (+3.44%)	⬆️
aiida/backends/djsite/globalsettings.py	86.84% <0%> (+5.26%)	⬆️
aiida/cmdline/commands/user.py	75.64% <0%> (+6.41%)	⬆️
aiida/backends/sqlalchemy/__init__.py	100% <0%> (+14.28%)	⬆️
aiida/common/setup.py	69.18% <0%> (+24.94%)	⬆️
... and 1 more

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[dev-zero]

a debug build in travis shows the following entries when running pgtest's locate command to find the pg_ctl command:

$ locate -r '/pg_ctl$'
/usr/lib/postgresql/9.2/bin/pg_ctl
/usr/lib/postgresql/9.3/bin/pg_ctl
/usr/lib/postgresql/9.4/bin/pg_ctl
/usr/lib/postgresql/9.5/bin/pg_ctl
/usr/lib/postgresql/9.6/bin/pg_ctl

[DropD]

@dev-zero keep in mind if you rebased on develop after friday 6 pm, the relevant tests will be skipped, If you want to know whether this actually fixes the problem, you will have to unskip them.

[dev-zero]

@DropD thanks, I noticed. Can you review the changes? It seems that the issue was that locate inside pgtest was actually picking up PostgreSQL-9.2. Commit 030e716 solves an unrelated issue I encountered when setting up a private Travis instance to get into the debug mode. There a SSH-Key was already available, but with its public key only in authorized_keys instead of a separate id_rsa.pub file. Not sure whether it was because of the debug mode, the private instance or a caching issue.

[DropD]

Thanks for helping out with this!

[DropD]

@dev-zero can you please make a pull request with the same changes to release_v0.12.2?

[dev-zero]

@DropD np, sure, see PR #1736