Show method name in result messages; remove spurious if statement

See Redmine 2070 - https://cfengine.com/dev/issues/2070

Added method name to messages generated about results of method
invocations.

Skipped this change during conflict resolving:
Removed an "if(bp)" true clause in the "else" clause of another
"if(bp)" statement.
(cherry picked from commit 1b41930197e707e75861d0b57751280bb1d60cf8)