Fix errors reported by ansible-test

Fix reference to set_active_gateway method in aoscx_vlan_interface

Signed-off-by: Andrew Austin <aaustin@redhat.com>

Add QoS and Interface modules, fix bugs and docs

A restructuring has been done to interface modules to
allow for configuration of interface admin state and
other interface specific configurations in the
aoscx_interface module. Inclusion of QoS specific configurations
is added to new modules and existing interface module.

This commit:

• fix documentation for various modules
• fix idempotency for ACL Entries and VLANs restructures interface modules
• includes QoS modules

New modules included are:

• aoscx_interface
• aoscx_qos
• aoscx_qos_cos
• aoscx_qos_dscp
• aoscx_queue
• aoscx_queue_profile
• aoscx_queue_profile_entry
• aoscx_system

Fix SSH connection issue

Fix SSH connection issue
A change in how Ansible uses SSH connections caused the code in this
collection to stop working on Ansible 2.10 and newer, which caused
aoscx_command, and aoscx_config to stop working

After reporting this in

ansible-collections/ansible.netcommon#301

a RedHat engineer suggested using send_command instead of exec_command,
and changing how the prompt was working

This commit:

• implements the suggested changes
• removes a no-longer-needed import for exec_command
• removes empty lists for variables related to the prompt, and
• reformats the config prompt regex
• fix for issue #10
• fix for issue #8

Bug fixes for modules

• fixes bug found in issue #11
• fixes issue #13
• Merge pull request #12 from alagoutte/ansible-doc-acl