chore(release): adjust examples for 7.12 release

* bpmn: remove Maven 1.x artifacts
* multi-tenancy: upgrade to WildFly
* process-engine-plugin: change listener event to assignment
* spring-nonpa: upgrade to WildFly
* spring-pa: upgrade to WildFly, refactor Arquillian WebArchive creation code

related to CAM-11015, CAM-11016, CAM-11017, CAM-11018, CAM-11019, CAM-11020, CAM-11099

chore(release): adjust examples for 7.9 release

* Adjust bpmn examples for 7.9
* Adjust plugin&model api examples
* Test & adjust webapps examples for 7.9
* Add check in case task does not have pd in SDK for NodeJS
* Bump spring boot to 2.0.0
* Bump camunda spring boot starter to 3.0.0
* Adjust tests to spring boot 2.0
* Adjust misc api examples
* Bump cargo mvn tomcat container to 9.0.5
* Upgrade Spring Boot version

Related to CAM-9026, CAM-9029, CAM-9031, CAM-9030, CAM-9025, CAM-9028, CAM-9025, CAM-9030

7.7 examples repository

chore(tags): add link to tag for the adjusted 7.6 examples repository

related to #CAM-7022

improve(spin): separate global and local data format configuration

- extend example for pa-local configuration to run on all application
  servers
- Tomcat build includes Weld in the application and a hack to make the
  process application available as a bean. This is for the sake of having
  one version of the example code (using CDI) that runs on all servers

related to CAM-5280

chore(README): fix typo

Merge pull request camunda#7 from artild/patch-1

Update README.md