When running the installation script on variants with larger NANDs, two of the
script's commands take longer than our intended timeouts under specific
circumstances:
* When the variant has a NAND with 512 MiB or more and singlemtdsys is set
to "yes", running ubivolscipt takes longer than our 10 second timeout.
The larger the NAND storage size, the longer this command takes.
* When the variant has a 1 GiB NAND, singlemtdsys is set to "yes" and
dualboot is set to "no", the update of the recovery UBI volume takes
longer than our 15 second timeout.
In both of these cases, the script fails and the installation process cannot
continue. Apply the following changes to prevent this:
* Increase the ubivolscript timeout from 10 seconds to 30
* Increase the recovery update timeout from 15 seconds to 20
Also, remove the command immediately before ubivolscript is run, since said
command is already being run at the beginning of ubivolscript.
https://onedigi.atlassian.net/browse/DEL-9097
Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>