Fix code coverage

[scalm]

The code coverage is now broken. This shows only the coverage for the specs.

https://github.com/colszowka/simplecov
SimpleCov Getting Started:

Note: If SimpleCov starts after your application code is already loaded (via require), it won't be able to track your files and their coverage! The SimpleCov.start must be issued before any of your application code is required!

I moved the lines above so that the 'lib' directory also got covered

[codecov]

Codecov Report

Merging #119 into master will decrease coverage by 1.64%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #119      +/-   ##
==========================================
- Coverage     100%   98.35%   -1.65%     
==========================================
  Files           7       24      +17     
  Lines         602     1521     +919     
==========================================
+ Hits          602     1496     +894     
- Misses          0       25      +25

Impacted Files	Coverage Δ
lib/etcdv3/etcdrpc/kv_pb.rb	100% <0%> (ø)
lib/etcdv3/connection_wrapper.rb	93.75% <0%> (ø)
lib/etcdv3/kv/requests.rb	100% <0%> (ø)
lib/etcdv3/etcdrpc/auth_pb.rb	100% <0%> (ø)
lib/etcdv3/lease.rb	100% <0%> (ø)
lib/etcdv3/maintenance.rb	100% <0%> (ø)
lib/etcdv3/etcdrpc/rpc_services_pb.rb	100% <0%> (ø)
lib/etcdv3/connection.rb	91.3% <0%> (ø)
lib/etcdv3/etcdrpc/rpc_pb.rb	100% <0%> (ø)
spec/helpers/connections.rb	93.75% <0%> (ø)
... and 7 more

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[davissp14]

Thanks!