Add SERVICE_ADDRESS to generated resource names toString()

[andreamlin]

Fixes googleapis/google-cloud-java#4416.

[andreamlin]

PTAL

[codecov]

Codecov Report

Merging #2529 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2529      +/-   ##
============================================
- Coverage     86.72%   86.71%   -0.01%     
+ Complexity     5420     5419       -1     
============================================
  Files           461      461              
  Lines         21411    21411              
  Branches       2348     2348              
============================================
- Hits          18568    18567       -1     
  Misses         1998     1998              
- Partials        845      846       +1

Impacted Files	Coverage Δ	Complexity Δ
.../java/com/google/api/codegen/discovery/Schema.java	84.34% <0%> (-0.51%)	42% <0%> (-1%)

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