Task creation errors are not displayed anymore

[obourdon]

Test scenario with only snap repository plugins (mock, mock-file, passthru)

Copy the test task in /tmp with a slight modification which is to replace the foo metric by a non-existing foo1 one:

sed -e 's?mock/foo?mock/foo1?' examples/tasks/mock-file.json > /tmp/q.json

In the snap repository launch the following commands:

# make all
# ./build/bin/snapd -t 0 -l 1 -a build/plugin -o /tmp --log-colors=false --log-truncate&
# ./build/bin/snapctl task create -t /tmp/q.json 
Using task manifest to create task

The errors are caught and identified by the snap daemon:

$ grep =error /tmp/snapd.log 
time="2016-07-26T15:22:18+02:00" level=error msg="error getting plugin version" _block=getVersions _file="metrics.go," _module=control error="Metric not found: /intel/mock/foo1" 
time="2016-07-26T15:22:18+02:00" level=error msg="error getting plugin version from metric catalog" _block=get _file="metrics.go," _module=control error="Metric not found: /intel/mock/foo1" 

Using a network sniffer to look at the REST reponses shows that the errors however they are not displayed any more