CamelSources not working in nightly

[nicolaferraro]

Get this error:

Exception in thread "main" org.apache.camel.RuntimeCamelException: java.lang.RuntimeException: Error creating instance of loader: knative-source
	at org.apache.camel.RuntimeCamelException.wrapRuntimeCamelException(RuntimeCamelException.java:52)
	at org.apache.camel.k.listener.RoutesConfigurer.load(RoutesConfigurer.java:64)
	at org.apache.camel.k.listener.RoutesConfigurer.accept(RoutesConfigurer.java:52)
	at org.apache.camel.k.listener.AbstractPhaseListener.accept(AbstractPhaseListener.java:32)
	at org.apache.camel.k.main.ApplicationRuntime$MainListenerAdapter.lambda$invokeListeners$0(ApplicationRuntime.java:179)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
	at java.base/java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:357)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
	at org.apache.camel.k.main.ApplicationRuntime$MainListenerAdapter.invokeListeners(ApplicationRuntime.java:178)
	at org.apache.camel.k.main.ApplicationRuntime$MainListenerAdapter.beforeConfigure(ApplicationRuntime.java:152)
	at org.apache.camel.main.BaseMainSupport.postProcessCamelContext(BaseMainSupport.java:584)
	at org.apache.camel.main.BaseMainSupport.initCamelContext(BaseMainSupport.java:423)
	at org.apache.camel.k.main.ApplicationRuntime$MainAdapter.doInit(ApplicationRuntime.java:195)
	at org.apache.camel.support.service.ServiceSupport.init(ServiceSupport.java:83)
	at org.apache.camel.support.service.ServiceSupport.start(ServiceSupport.java:112)
	at org.apache.camel.main.MainSupport.run(MainSupport.java:82)
	at org.apache.camel.k.main.ApplicationRuntime.run(ApplicationRuntime.java:71)
	at org.apache.camel.k.main.Application.main(Application.java:42)
Caused by: java.lang.RuntimeException: Error creating instance of loader: knative-source
	at org.apache.camel.k.support.RuntimeSupport.lambda$lookupLoaderFromResource$10(RuntimeSupport.java:212)
	at java.base/java.util.Optional.orElseThrow(Optional.java:408)
	at org.apache.camel.k.support.RuntimeSupport.lookupLoaderFromResource(RuntimeSupport.java:212)
	at org.apache.camel.k.support.RuntimeSupport.lookupLoaderById(RuntimeSupport.java:189)
	at org.apache.camel.k.support.RuntimeSupport.lambda$loaderFor$8(RuntimeSupport.java:173)
	at java.base/java.util.Optional.map(Optional.java:265)
	at org.apache.camel.k.support.RuntimeSupport.loaderFor(RuntimeSupport.java:172)
	at org.apache.camel.k.listener.RoutesConfigurer.load(RoutesConfigurer.java:82)
	at org.apache.camel.k.listener.RoutesConfigurer.load(RoutesConfigurer.java:62)
	... 21 more

Apparently the dependencies for a simple timer to channel contain:

    - camel:timer
    - mvn:org.apache.camel.k/camel-k-runtime-main

While in RC2 it was:

    - camel:timer
    - mvn:org.apache.camel.k/camel-k-loader-knative
    - mvn:org.apache.camel.k/camel-k-loader-yaml
    - mvn:org.apache.camel.k/camel-k-runtime-knative
    - mvn:org.apache.camel.k/camel-k-runtime-main

We can add an example of Camel Source from last released Knative in the CI to avoid such regressions.