As i know, you don’t need do perform another install all because the upgrade seems to worked correctly (infact current running images are kickstart image file is: bootflash:///n5000-uk9-kickstart.7.0.6.N1.1.bin and system image file is: bootflash:///n5000-uk126.96.36.199.N1.1.bin .
Probably you need to re-set the boot variables reflecting new images using those commands :
no boot system bootflash:n5000-uk188.8.131.52.N1.4.bin
no boot kickstart bootflash:n5000-uk9-kickstart.5.2.1.N1.4.bin
boot kickstart bootflash:n5000-uk184.108.40.206.N1.1.bin
and then verify the boot variables on next reload issuing the show boot command.
Hope this helps.