[get_url] check against lowered stripped sha256sum

The content of the sha256sum attribute should be lowered before comparing it with the calculated sha256sum.

In the following example the used sha256sum uses ABC.. and not abc.. and the check failed. This should not happen.

```
TASK: [get_url url=http://ftp.fau.de/apache/hadoop/common/hadoop-2.4.0/hadoop-2.4.0.tar.gz dest=/home/vagrant/hadoop-2.4.0.tar.gz mode=0644 sha256sum=024326AC68A1A68B5566B10F95609EAAFD9F70CFEB37FCA0E97CBB1674E57C3A] ***
failed: [instance000] => {"failed": true}
msg: The SHA-256 checksum for /home/vagrant/hadoop-2.4.0.tar.gz did not match 024326AC68A1A68B5566B10F95609EAAFD9F70CFEB37FCA0E97CBB1674E57C3A; it was 024326ac68a1a68b5566b10f95609eaafd9f70cfeb37fca0e97cbb1674e57c3a.

FATAL: all hosts have already failed -- aborting
```

Fixes #7295

Fix sync_binlog name in mysql_variables example

Merge branch 'fixing_apache2_module' of https://github.com/berendt/ansible into berendt-fixing_apache2_module

The previous sync_binary_log is not a real MySQL variable.

ignore remnants from doing a setup.py install

* the current state of the ELB was not reflected properly when checking
  the status after a change was made.
* invalid zones caused a traceback when enabling/disabling zones

Fixes #7270

Docker inventory bugfix for potential traceback

fixes #7107

fixed typos found by RETF rules in RST files

rules are avaialble at https://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser/Typos

Also adds an integration test for the above.

Fixes #7254

Fixes #7256

Modify the way we set the localization environment

Merge branch 'fix-copy-recursive-issue' of https://github.com/tksmd/ansible into tksmd-fix-copy-recursive-issue

- reverse the order of new_directory_list returned from split_pre_existing_dir in copy module

Previously, we set the LANG (and LC_CTYPE) environment variables
directly in the module code and applied them with os.environ().
Instead, we are now pre-pending those variables to the environment
string used to execute the command which allows the user to
override the localization values by setting the environment values
directly (even on a per-task basis):

  - subversion: repo=file:///path/to/repos/svn_über dest=/tmp/svntest
    environment:
      LANG: "C"
      LC_CTYPE: "en_US.UTF-8"

So if a user wishes to default their LANG back to C, they can still
avoid unicode issues by doing the above.

Fixes #7060

Make concatenating certs robust in urls.py

Add a newline after each certificate file explicitly to avoid problems
with files that do not end with a newline themselves.

Fix dates from RPM SPEC changelog

fix issue #7228 ec2_vol crash