billing: Add transaction.atomic() for Customer creation and logging.
billing: Add transaction.atomic() for Customer creation and logging.

jackrzhang/zulip,synicalsyntax/zulip,brainwane/zulip,brainwane/zulip,rht/zulip,jackrzhang/zulip,zulip/zulip,synicalsyntax/zulip,showell/zulip,punchagan/zulip,brainwane/zulip,hackerkid/zulip,showell/zulip,hackerkid/zulip,rishig/zulip,brainwane/zulip,tommyip/zulip,shubhamdhama/zulip,kou/zulip,kou/zulip,dhcrzf/zulip,rishig/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,brainwane/zulip,showell/zulip,punchagan/zulip,andersk/zulip,dhcrzf/zulip,hackerkid/zulip,tommyip/zulip,zulip/zulip,hackerkid/zulip,shubhamdhama/zulip,rht/zulip,eeshangarg/zulip,rht/zulip,dhcrzf/zulip,tommyip/zulip,synicalsyntax/zulip,dhcrzf/zulip,eeshangarg/zulip,eeshangarg/zulip,showell/zulip,synicalsyntax/zulip,jackrzhang/zulip,timabbott/zulip,punchagan/zulip,rht/zulip,shubhamdhama/zulip,eeshangarg/zulip,rishig/zulip,zulip/zulip,timabbott/zulip,tommyip/zulip,hackerkid/zulip,rishig/zulip,brainwane/zulip,synicalsyntax/zulip,synicalsyntax/zulip,eeshangarg/zulip,andersk/zulip,eeshangarg/zulip,jackrzhang/zulip,punchagan/zulip,tommyip/zulip,punchagan/zulip,kou/zulip,jackrzhang/zulip,timabbott/zulip,kou/zulip,dhcrzf/zulip,rishig/zulip,tommyip/zulip,zulip/zulip,jackrzhang/zulip,punchagan/zulip,tommyip/zulip,jackrzhang/zulip,showell/zulip,hackerkid/zulip,showell/zulip,zulip/zulip,andersk/zulip,andersk/zulip,dhcrzf/zulip,synicalsyntax/zulip,shubhamdhama/zulip,shubhamdhama/zulip,rht/zulip,hackerkid/zulip,rht/zulip,andersk/zulip,shubhamdhama/zulip,kou/zulip,andersk/zulip,rishig/zulip,timabbott/zulip,timabbott/zulip,kou/zulip,brainwane/zulip,rht/zulip,timabbott/zulip,dhcrzf/zulip,showell/zulip,rishig/zulip,timabbott/zulip,andersk/zulip,punchagan/zulip,shubhamdhama/zulip,zulip/zulip