[FAB-12440] disable goimports in linting
[FAB-12440] disable goimports in linting

The upstream x/tools repo merged changes to goimports as "improvements"
that are incompatible with existing code in fabric. Since we pull and
build the tools from master on every build, we get what we get.

Disable goimports.

Change-Id: I4b5bcaf5befe4e3f4f40f393d8d4e363890ed2b4
Signed-off-by: Matthew Sykes <89c6e4c9c1046731a9c37abefc223a83de36a5d9@us.ibm.com>

stemlending/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,stemlending/fabric,stemlending/fabric,muralisrini/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,binhn/fabric,jimthematrix/fabric,xixuejia/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,jimthematrix/fabric,manish-sethi/fabric-sidedb,xixuejia/fabric,xixuejia/fabric,hyperledger/fabric,muralisrini/fabric,binhn/fabric,hyperledger/fabric,manish-sethi/fabric-sidedb,binhn/fabric,muralisrini/fabric