INIT: Add unit tests in pkg

[lumtis]

Listed below are the pkg that miss uni tests.
We should for each of them determine if unit tests can be added (eventually not if the pkg is too small or too reliable to an external source not mockable) and add the unit tests

• availableport
• chaincmd
• clictx
• cliquiz
• clispinner
• cmdrunner
• cosmosanalysis
• cosmosfaucet
• cosmosgen
• cosmosver
• events
• fs
• fswatcher
• gacli
• gocmd
• goenv
• gomodule
• iowait
• jsondoc
• localfs
• looseerrgroup
• markdownviewer
• protoc
• protopath
• randstr
• tendermintrpc
• xchisel
• xexec
• xgenny
• xrelayer
• xstrings

[salmad3]

Let's first assess applicable packages and then split issue.