TE-2546 Remove references to obsolete requirements files

Bump boto3 from 1.7.4 to 1.7.6

Bumps [boto3](https://github.com/boto/boto3) from 1.7.4 to 1.7.6.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](https://github.com/boto/boto3/compare/1.7.4...1.7.6)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Fix requirements for jenkins worker

revert splunk config work

Add environment token for id-verification faq page

add missing splunk hostname variable

add splunk config template to jenkins common

fix name of splunk config script

install and configure splunk plugin on jenkins

remove splunk forwarder from build jenkins

Make 2 XQueue variables available in ansible

Limit django access from MIT vpn cidrs

In order for the better experience of the user there is a need to
add environment token for the id-verification faq page so that
it can easily be accessed in platform.

LEARNER-5042

Pin pip in edxapp and in all IDAs that use the edx_django_service role.

Bump ecdsa from 0.11 to 0.13

Bumps [ecdsa](https://github.com/warner/python-ecdsa) from 0.11 to 0.13.
- [Changelog](https://github.com/warner/python-ecdsa/blob/master/NEWS)
- [Commits](https://github.com/warner/python-ecdsa/compare/python-ecdsa-0.11...python-ecdsa-0.13)

Bump paramiko from 2.4.0 to 2.4.1

Bump boto3 from 1.6.16 to 1.7.4

Bumps [boto3](https://github.com/boto/boto3) from 1.6.16 to 1.7.4.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](https://github.com/boto/boto3/compare/1.6.16...1.7.4)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump awscli from 1.14.63 to 1.15.4

* Added pingdom check creation utility + README + examples.

* docs

* Add comment explaining why we update every check

added uninstall datadog role in application playbooks