Retry vim-create

Sometimes it appears that the vim-create command gets issued
before LCM is properly ready, so as a workaround, this tries
a number of times to create the VIM before giving up.

Change-Id: Ie2189472731edd7dc66b2e32f466447237fe8aae
Signed-off-by: beierlm <mark.beierl@canonical.com>