Set keepalive to 5 seconds in paramiko_ssh.py

This update resolves https://github.com/ansible/ansible/issues/6476.
Return untouhced servers with exact_count
Improve the ec2_snapshot argument spec and docs

ec2_snapshot got missed when moving to a common argument spec.
It could already make use of the capabilities (as it uses
ec2_connect) and the documentation suggested it supported the
common argument spec (thanks to the documentation fragment work)
so it was just a matter of fixing the argument spec.

Removed unnecessary documentation for profile and security_token
that is covered by documentation fragment

Also removed spurious documentation flags (default: null, aliases: [])
which aren't needed.
if key name already exists on tenant, check if public_key is offered that it matches the existing key
Fixed incorrect handling of paths contaiin whitespaces
Don't use listify_ function, when all we want to do is template variables

This was causing a bug in the env module, due to the fact that we now
pass variables for the module through the templating engine combined
with the fact that we split-up the hostvars and setup variables. As a
result, if a variable in the env lookup had the same name as the variable
in Ansible, it would try and template itself over and over again until
the recursion limit would be hit, at which time an empty string was
returned.

Fixes #7396
Add example 'Specify grants composed of more than one word' to the mysql_user module.
Enable use of vault password for --syntax-check, --list-hosts and --list-tasks
Support internal-only ELBs in EC2.
now module searches for update-alternatives vs hardcoding it
Merge pull request #7470 from bcoca/update_bin

now module searches for update-alternatives vs hardcoding it
Merge branch 'multi-word-mysql-grant-example' of https://github.com/webmat/ansible into webmat-multi-word-mysql-grant-example
Merge branch 'webmat-multi-word-mysql-grant-example' into devel
Merge branch 'elb-internal' of https://github.com/asnare/ansible into asnare-elb-internal
Merge branch 'asnare-elb-internal' into devel
Stopped instances can also be terminated
fix UnicodeEncodeError when prompt is unicode.
fix UnicodeEncode error when using pause module with unicode prompt.
Merge branch 'shirou-devel' into devel
Merge pull request #7472 from atlashealth/ec2_terminate_paused_instances

EC2: stopped instances can also be terminated