Including tasks has a performance penalty when compared with importing
tasks. If the include has a condition associated with it, then the
overhead of the include may be lower than the overhead of skipping all
imported tasks. For unconditionally included tasks, switching to
import_tasks provides a clear benefit.
Benchmarking of include vs. import is available at [1].
This change switches from include_tasks to import_tasks where there is
no condition applied to the include.
[1] https://github.com/stackhpc/ansible-scaling/blob/master/doc/include-and-import.md#task-include-and-import
Partially-Implements: blueprint performance-improvements
Change-Id: Ia45af4a198e422773d9f009c7f7b2e32ce9e3b97
do_reconfigure.yml is introduced to use serial directive. But we use
it in wrong. Now serial has moved to playbook file. So it is time to
remove the do_reconfigure.yml file
Closes-Bug: #1628152
Change-Id: I8d42d27e6bc302a0e575b0353956eaef9b2ca9fd
