kde-build-metadata contains cycles

The kde-project-metadata file dependency-data-kf5-qt5 contains a cycle:

*: frameworks/extra-cmake-modules
*: Qt5

What this means is that:

1. frameworks/extra-cmake-modules depends on Qt5
2. Qt5 depends on frameworks/extra-cmake-modules

I.e. a cycle. The only reason this ever 'worked' was because anything beginning with the prefix Qt is ignored by the dependency parser of kdesrc-build in ksb::DependencyResolver. This is kind of bad, because of issue #19 (closed): fixing #19 (closed) must necessarily remove that restriction.

You can verify this by removing this restriction (see issue #19 (closed)) and running:

    kdesrc-build --debug kate

Producing the following output:

dep-resolv: Visiting kate
        dep-resolv: kate:master depends on Qt5:*
 * kate depends on Qt5:*, but no module builds Qt5:* for this run.
dep-resolv: Visiting  Qt5
        dep-resolv: Qt5:* depends on extra-cmake-modules:*
 * Qt5 depends on extra-cmake-modules:*, but no module builds extra-cmake-modules:* for this run.
dep-resolv: Visiting   extra-cmake-modules
        dep-resolv: extra-cmake-modules:* depends on Qt5:*
 * extra-cmake-modules depends on Qt5:*, but no module builds Qt5:* for this run.
dep-resolv: Visiting    Qt5
Somehow there is a dependency cycle involving Qt5! :( at /kdesrc-build/bin/modules/ksb/DependencyResolver.pm line 569.
        ksb::DependencyResolver::_visitDependencyItemAndDependencies(HASH(0x555b33c78c80), "Qt5", "*", 3, undef) called at /kdesrc-build/bin/modules/ksb/DependencyResolver.pm line 604
        ksb::DependencyResolver::_visitDependencyItemAndDependencies(HASH(0x555b33c78c80), "extra-cmake-modules", "*", 2, undef) called at /kdesrc-build/bin/modules/ksb/DependencyResolver.pm line 604
        ksb::DependencyResolver::_visitDependencyItemAndDependencies(HASH(0x555b33c78c80), "Qt5", "*", 1, undef) called at /kdesrc-build/bin/modules/ksb/DependencyResolver.pm line 604
        ksb::DependencyResolver::_visitDependencyItemAndDependencies(HASH(0x555b33c78c80), "kde/applications/kate", "master", undef, undef) called at /kdesrc-build/bin/modules/ksb/DependencyResolver.pm line 497
        ksb::DependencyResolver::_visitModuleAndDependencies(HASH(0x555b33c78c80), ksb::Module=HASH(0x555b33c02788)) called at /kdesrc-build/bin/modules/ksb/DependencyResolver.pm line 673
        ksb::DependencyResolver::resolveDependencies(ksb::DependencyResolver=HASH(0x555b33c06c80), ksb::Module=HASH(0x555b33c02788)) called at /kdesrc-build/bin/modules/ksb/Application.pm line 600
        eval {...} called at /kdesrc-build/bin/modules/ksb/Application.pm line 585
        ksb::Application::_resolveModuleDependencies(ksb::Application=HASH(0x555b3258b910), ARRAY(0x555b32ce0150), ARRAY(0x555b32ce0120)) called at /kdesrc-build/bin/modules/ksb/Application.pm line 496
        ksb::Application::generateModuleList(ksb::Application=HASH(0x555b3258b910), "--rc-file=/kdesrc-build/etc/kdesrc-build.rc", "--set-module-option-value", "global,kdedir,/home/prometheus/projects/kde/dist", "--set-module-option-value", "global,qtdir,/home/prometheus/projects/kde/dist/custom/qt", "--set-module-option-value", "global,source-dir,/home/prometheus/projects/kde/src", ...) called at /kdesrc-build/bin/modules/ksb/Application.pm line 68
        ksb::Application::new("ksb::Application", "--rc-file=/kdesrc-build/etc/kdesrc-build.rc", "--set-module-option-value", "global,kdedir,/home/prometheus/projects/kde/dist", "--set-module-option-value", "global,qtdir,/home/prometheus/projects/kde/dist/custom/qt", "--set-module-option-value", "global,source-dir,/home/prometheus/projects/kde/src", ...) called at /kdesrc-build/bin/kdesrc-build line 364
        eval {...} called at /kdesrc-build/bin/kdesrc-build line 363
 * Problems encountered trying to sort modules into correct order:
 * Internal Error: 1
 * Will attempt to continue.