Split up login and target calls for better errors
Split up login and target calls for better errors

Signed-off-by: Ruth Byers <47d9a6cf87fc30102bd5f0e7c094d83115b4c83e@pivotallabs.com>

matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests