- Related: #6359

Now the CouchDB based tests will try 3 times before give up due to
timeout or some temporary error. The stop function will also execute
properly even if the process wasn't created, leaving no lost files or
folders behind.

As described in #4691, sometimes couch just hangs and all testing
freezes. This is due to no output from couch (sometimes meaning that an
error on boot wasn't logged). This adds a timeout and checks for it
while booting for tests. Closes #4691

CouchServerState does not use two extra parameters anymore. Tests are
now reflecting this change. Relate to #6833

The .ini used before was very old and did not contain all the config
values that couch needs. Using -n resets the configuration file chain,
making it use what is provided without including the system defaults
needed. To make it work with all versions the util will now copy
default.ini to temp dir and use it as additional config, overwriting
only what is needed with couchdb.ini.template provided.

This commit removes some leftover code from a time when Soledad Server used to
check for permissions on certain databases when starting (i.e. shared and
tokens databases). This was later removed as correct permissions enforcement
was relayed to tapicero.

Closes: #6833.

In the past, we wanted dependency on leap.common to be optional, but now
because of the explicit use of the config path prefix and signaling, we want
to enforce dependency on leap.common.