This commit also  fixes other arguments which were read  and parsed as regular
configuration files.

Previously, cert_file and key_file could  only be set from slapconsole section
but  as it's  supposed to  already been  defined in  slapos section,  then use
slapos values first, then fallback on slapconsole section.

slapconsole  should not fail  when there  is no  "slapconsole" section  in the
configuration file, as defaults should be enough.

Add new transitions to follow the same design of Software Instance and the scripts to each transition

remove stepTic because in this test the transaction should be called after create two Slave Instances with different customers and flag skip because this tests is not finished yet

Add transitions to start and stop a Slave Instance and the scripts used to each transition. The goal is to follow the same design of Software Instance

remove interactions because the scripts used to each interactions was deleted. This interactions are used to access Slave Partitions and it is not used anymore

clean up scripts, remove not useless scripts and remove part of code that is used to find Slave Partitions

revert code because the transition start_request and stop_requested were added to Slave Instance. With this, is not required check because both objects(Slave Instance and Software Instance) have this transitions

remove slave_id_list because it is obsolete and add slave_instance_list with empty list because this key was added in paremeter dict

slapos.xsd seems package global.

slapformat is small enough to be just one file.

check first if the transition exists because in Slave Instance context this transition doesn't exist

reorganize steps, rename tests to Slave Instance to follow one pattern in names and implemented tests to check that the customer B can not access a Slave Instance created by customer A

add step to test_ComputerPartition_SlaveInstance_ParameterList to check that the slave instance informations are add correctly in computer partition informations