fix camel-jetty* features

JBossFuse:karaf@root> features:info camel-jetty8
Description of camel-jetty8 2.17.0.redhat-630069 feature
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camel-jetty8 intend to work with jetty8, so this feature only works in the karaf container which support jetty8, e.g. karaf 2.x/3.x
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Feature has no configuration
Feature has no configuration files
Feature depends on:
  jetty 0.0.0
  camel-core 2.17.0.redhat-630069
Feature contains followed bundles:
 mvn:org.apache.camel/camel-http-common/2.17.0.redhat-630069 start-level=50
 mvn:org.apache.camel/camel-jetty-common/2.17.0.redhat-630069 start-level=50
 mvn:org.apache.camel/camel-jetty8/2.17.0.redhat-630069 start-level=50
Feature has no conditionals.

JBossFuse:karaf@root> features:info camel-jetty9
Description of camel-jetty9 2.17.0.redhat-630069 feature
----------------------------------------------------------------
camel-jetty9 intend to work with jetty9, so this feature only works in the karaf container which support jetty9, e.g. karaf 4.x
----------------------------------------------------------------
Feature has no configuration
Feature has no configuration files
Feature depends on:
  jetty 0.0.0
  camel-core 2.17.0.redhat-630069
Feature contains followed bundles:
 mvn:org.apache.camel/camel-http-common/2.17.0.redhat-630069 start-level=50
 mvn:org.apache.camel/camel-jetty-common/2.17.0.redhat-630069 start-level=50
 mvn:org.apache.camel/camel-jetty9/2.17.0.redhat-630069 start-level=50
Feature has no conditionals.

JBossFuse:karaf@root> features:install camel-jetty9
JBossFuse:karaf@root> features:install camel-jetty8
Error executing command: Can not resolve feature:
Unsatisfied requirement(s):
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   package:(&(package=org.eclipse.jetty.util.ssl)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8
   package:(&(package=org.eclipse.jetty.server)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8
   package:(&(package=org.eclipse.jetty.util.thread)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8
   package:(&(package=org.eclipse.jetty.io)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8
   package:(&(package=org.eclipse.jetty.client)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8
   package:(&(package=org.eclipse.jetty.util)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8
   package:(&(package=org.eclipse.jetty.http)(version>=8.0.0)(!(version>=9.0.0)))
      camel-jetty8