20d960ff98
In Python 2.6 it was required to use {0}, {1}...{n} when using the string format function. In Python 2.7 and Python 3 it it not required. Change {N} to {} in code. This brings the code in style alignment with other projects like ironic and ironic-lib. Change-Id: I81c4bb67b0974f73905f14b589b3dd0a7131650d Depends-On: I8f0e5405f3e2d6e35418c73f610ac6b779dd75e5