Otherwise telegraf start but does not create database and does not send
data:

```
2018-01-17T03:44:54Z I! Database creation failed: Post
https://[2001:67c:1254:e:....]:8086/query?q=CREATE+DATABASE+%22telegraf%22: dial tcp [2001:67c:1254:e:....]:8086: getsockopt: connection refused
2018-01-17T03:44:54Z I! Starting Telegraf v1.6.0~90b6b760
2018-01-17T03:44:54Z I! Loaded outputs: influxdb
2018-01-17T03:44:54Z I! Loaded inputs: inputs.cpu inputs.mem inputs.disk inputs.diskio inputs.system
2018-01-17T03:44:54Z I! Tags enabled: host=f114dfe44f75
2018-01-17T03:44:54Z I! Agent Config: Interval:10s, Quiet:false, Hostname:"f114dfe44f75", Flush Interval:10s
2018-01-17T03:45:10Z E! InfluxDB Output Error: Response Error: Status Code [404], expected [204], [database not found: "telegraf"]
2018-01-17T03:45:10Z E! Error writing to output [influxdb]: Could not write to any InfluxDB server in cluster
``

This nodejs version needs python in $PATH for the build. During build,
it will build `icupkg` without honoring $LDFLAGS, so our rpath does not
work and this icupkg does not find it's libssl. To prevent it from using
system libssl, run the build step under $LD_LIBRARY_PATH

getWorkingSet() is slow and it is not always needed. So, it is better not to call it in __init__.

When git repositories are in detached head, `git symbolic-ref` cannot be used.

In this case, `gowork-snapshot` outputs `fatal: ref origin is not a symbolic ref` and create a buildout profile with empty revisions.

After these changes, we try to get from a remote named origin in this case. If this did not work, we output the problematic repository.

I added some minor "cleanups" at the same time.

/reviewed-on nexedi/slapos!268
/reviewed-by kirr

because other variables are vertically aligned

When git repository is in detached head, there's no symbolic-ref, so we
cannot anything better that assuming there's a remote named "origin"

This reverts commit 6cb00ff0,
because of a regression in InnoDB (https://jira.mariadb.org/browse/MDEV-14614).
Several functional tests started to fail with 10.2.12.

As currently it fallbacks to system's gettext

While testing this merge request : erp5!243

The following test was failing for me : https://nexedi.erp5.net/test_result_module/20180107-664D9A6/13

Since numpy is not added as a dependecy for h5py. the testnode didn't upgraded numpy while upgrading h5py. 
Adding numpy as a dependency should fix it

/reviewed-on !267

Fixes all cloudooo being given the same port, because of jinja2 variable
scoping.
Also, move to buildout.hash.cfg for md5sum maintenance ease.

Also update README accordingly.
Its becasue now erp5-site is being created automatically using software-type
default and there is no create-erp5-site software-type anymore.

In the particular case of PATH, '' is the same as '.',
which is a bad idea from a security point of view.

instance-erp5.cfg.in:
  quoted values should not be part of the configuration parameters
    https://lab.nexedi.com/nexedi/slapos.toolbox/blob/beb86eab2dee7178aa6e4795da0f56bb6cacaea1/slapos/apachedex.py#L62
  modify default apachedex parameters
    --erp5-base +erp5 .*/VirtualHostRoot/erp5(/|\?|$)
    --base +other /
instance-balancer.cfg.in:
  option `--configuration` should be used instead of `--config`
    https://lab.nexedi.com/nexedi/slapos.toolbox/blob/beb86eab2dee7178aa6e4795da0f56bb6cacaea1/slapos/apachedex.py#L76

instance-mariadb.cfg.in:
  rename slowquerydex folder to slowquery_digest
mysql-querydigest.sh.in:
  exit 1 on error
  add date to the output file name of pt-query-digest to fit promise behavior
    https://lab.nexedi.com/nexedi/slapos.toolbox/blob/beb86eab2dee7178aa6e4795da0f56bb6cacaea1/slapos/promise/check_slow_queries_digest_result/__init__.py#L29
  review sh arguments handling
  end message: "ok" -> "Report generated successfully." or ..."failed with code $?"

https://cgit.freedesktop.org/fontconfig/commit/?id=1ab5258f7c2abfafcd63a760ca08bf93591912da

fontconfig > 2.12.1 now requires gperf.

This reverts commit 38123b86.

fontconfig was not building any more on many machines (most testnode machines). Revert
until investigation is done.

https://patchwork.openembedded.org/patch/134994/