feat(jndi): Add documentation to use jndi bindings

- add documentation for JNDI Bindings for Bpm Platform Services
- add documentation for JNDI Bindings for Bpm Platform Services on Apache
  Tomcat 7

related to CAM-495, CAM-496
Merge branch 'initial-version' of github.com:camunda/docs.camunda.org into initial-version

Conflicts:
	site/src/documents/guides/user-guide/chapters/01-bpm-platform.md