Bring sandbox instructions up to date

 - sandbox permissions request now by ticket rather than e-mail
 - update jenkins_jobs.ini usage instructions
 - typos and grammar

Issue-ID: CIMAN-261
Signed-off-by: kaihlavi <l.kaihlavirt@partner.samsung.com>
Change-Id: Ibab58dabab74b5b5a7d2a38ae70c096af9a8218d
1 file changed