Improvement #112 PostgresqlDB password is passed to pg_dump and psql command

Postgresql database usages improvement
 
Current version did not pass the database password into the <code>pg_dump</code> or the <code>psql</code> command during any of the tasks:
<pre>cap database:dump:local        
cap database:dump:remote                
cap database:move:to_local               
cap database:move:to_remote</pre>

The impact was that password protected postgresql database could not be dumped or moved unless a .pgpass file is used on the remote and local server.
This patch will pass the password into these commands and will no longer needs the usages of a .pgpass file on the remote and local host.

This is an enhancement of the previous issue: https://github.com/everzet/capifony/pull/112