[API] - Log middleware exceptions

[JeffreyDevloo]

Certain middleware functions are not logged in the webapp-api

[sjovdnbos]

Fixed by:

openvstorage/framework-alba-plugin#636
#2273
#2274
https://github.com/openvstorage/framework-iscsi-plugin/pull/85

Packaging info:

openvstorage-2.13.5-dev.1552299890.591bd38
openvstorage-iscsi-plugin-0.5.2-dev.1552300029.a7f0143
openvstorage-backend-1.13.3-dev.1552299989.3360ef6