The timeout calculation of nested resource groups are using seconds but
then it passing the value in seconds to the stack resource that is
expected it in minutes. This leads to a rapidly increasing timeout value
in each nesting levels.
This patch converts the seconds to minutes before passing it forward.
Story: 2009237
Task: 43372
Change-Id: I3f132d4889723f7b4a3a416779ac5ee7663249b8