Align documented repositories with quickstart's repositories

https://access.qa.redhat.com/documentation/en-us/red_hat_jboss_fuse/7.0-tp/html-single/fuse_on_openshift_guide/index#get-started-prepare-dev-env mentions only

• Maven central: https://repo1.maven.org/maven2
• Red Hat GA repository: https://maven.repository.redhat.com/ga
• Red Hat EA repository: https://maven.repository.redhat.com/earlyaccess/all

but eg. https://github.com/fabric8-quickstarts/karaf-camel-rest-sql/blob/karaf-camel-rest-sql-1.0.0.fuse-000021-redhat-2/configuration/settings.xml#L74 is referencing JBoss EA