Reflect changes of ldap plugin version > 1.10.

Adapting ldap plugin test to plugin version 1.10.
Merge branch 'task_scanner_tests' of https://github.com/hm-ende/acceptance-test-harness
Merge branch 'ldap' of https://github.com/eidottermihi/acceptance-test-harness
Added Codeanalyzer test-cases, which are based on building a project via maven.

Ensures that maven is installed if it is needed for the new tests.
Added maven tests for Checkstyle: Checkstyle.build_simple_maven_project, Checkstyle.build_simple_maven_project_and_check_if_it_is_unstable, Checkstyle.build_simple_maven_project_and_check_if_failed
Added maven tests for Pmd: PmdPluginTest.build_simple_maven_project, PmdPluginTest.build_simple_maven_project_and_check_if_it_is_unstable, PmdPluginTest.build_simple_maven_project_and_check_if_failed
Added maven tests for Findbugs: Findbugs.build_simple_maven_project, Findbugs.build_simple_maven_project_and_check_if_it_is_unstable, Findbugs.build_simple_maven_project_and_check_if_failed and architecture for maven code analyzer configuration.