Camel / Fabric8 features should use servicemix-specs version of jsr311-api

The fabric8 and the camel features files are pulling in javax.ws.rs:jsr311-api, which contains a FactoryFinder class which is OSGI-incapable. We should be using the servicemix-specs version :

        <bundle dependency='true'>mvn:org.apache.servicemix.specs/org.apache.servicemix.specs.jsr311-api-1.1.1/2.5.0</bundle>

fabric8-karaf-1.2.0.redhat-621069-features.xml

    <feature name="jsr-311" version="1.2.0.redhat-621069">
        <bundle>mvn:javax.ws.rs/jsr311-api/1.1.1</bundle>
    </feature>

apache-camel-2.15.1.redhat-621069-features.xml uses jsr311 in camel-olingo2, camel-swagger, camel-jclouds

These are blocking ENTESB-4241, a 6.2.1 blocker for SwitchYard, so these changes should go into 6.2.1.