db2: fix OCF_SUCESS name in db2_notify

[pepadelic]

fix OCF_SUCESS to OCF_SUCCESS in db2_notify

db2_notify returns RC=1 due to misspelled variable name: . .

• 10:08:48: db2_validate:221: return 0
• 10:08:49: main:899: db2_notify
• 10:08:49: db2_notify:845: local node
• 10:08:49: db2_notify:848: '[' pre = pre -a demote = start ']'
• 10:08:49: db2_notify:849: return
• 10:08:49: main:900: exit 1

[knet-jenkins[bot]]

Can one of the admins check and authorise this run please: https://ci.kronosnet.org/job/resource-agents/job/resource-agents-pipeline/job/PR-1933/1/input

[oalbrigt]

Thanks.