Simple integration tests for {base,demo}coind

[alessio]

Test basecoind init && basecoind start sequence for both basecoin and democoin.

Closes: #1632

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.
• Wrote tests
• Updated relevant documentation (docs/)
• Added entries in PENDING.md with issue #
• rereviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #2124 into develop will increase coverage by 1.59%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2124      +/-   ##
===========================================
+ Coverage     62.2%   63.79%   +1.59%     
===========================================
  Files          115      134      +19     
  Lines         6874     8157    +1283     
===========================================
+ Hits          4276     5204     +928     
- Misses        2314     2604     +290     
- Partials       284      349      +65

[fedekunze]

@alessio you forgot to update PENDING.md

[alessio]

@fedekunze done, thanks for pointing it out!

[cwgoes]

utACK