Fix several dependency issues
Fix several dependency issues

This is the result of running lein-pedantic against the project, which
advises about top-level dependencies overruling transitive dependencies.
Several exclusions are added, to be explicit about which version we
want, and several dependencies are upgraded. The upgraded dependencies
are activemq, cheshire, slingshot, and clj-http.

cprice404/puppetdb,cprice404/puppetdb,rbrw/puppetdb,waynr/puppetdb,rbrw/puppetdb,highb/puppetdb,johnduarte/puppetdb,rbrw/puppetdb,senior/puppetdb,mullr/puppetdb,nfagerlund/puppetdb,jantman/puppetdb,melissa/puppetdb,mullr/puppetdb,jantman/puppetdb,shrug/puppetdb,kbarber/puppetdb,highb/puppetdb,kbrezina/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,kbrezina/puppetdb,waynr/puppetdb,github/puppetlabs-puppetdb,wkalt/puppetdb,nfagerlund/puppetdb,ajroetker/puppetdb,waynr/puppetdb,wkalt/puppetdb,johnduarte/puppetdb,github/puppetlabs-puppetdb,shrug/puppetdb,mullr/puppetdb,senior/puppetdb,wkalt/puppetdb,kbarber/puppetdb,highb/puppetdb,puppetlabs/puppetdb,ajroetker/puppetdb,johnduarte/puppetdb,shrug/puppetdb,melissa/puppetdb,grimradical/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,ajroetker/puppetdb,shrug/puppetdb,grimradical/puppetdb,ajroetker/puppetdb,senior/puppetdb,kbrezina/puppetdb,github/puppetlabs-puppetdb,highb/puppetdb,mullr/puppetdb,kbrezina/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,senior/puppetdb,waynr/puppetdb,kbarber/puppetdb,rbrw/puppetdb,nfagerlund/puppetdb,wkalt/puppetdb,grimradical/puppetdb,johnduarte/puppetdb,melissa/puppetdb,grimradical/puppetdb,cprice404/puppetdb,kbarber/puppetdb,jantman/puppetdb