Better indentation when adding GCP libraries to pom.xml

[lak-proddev]

Change-Id: I5d4a22b089f1516845e8597cf11c5198772dc4dd

fixes #3381

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@f8c6895). Click here to learn what that means. The diff coverage is 94.44%.

@@            Coverage Diff            @@
##             master    #3511   +/-   ##
=========================================
  Coverage          ?   70.10%           
  Complexity        ?     2990           
=========================================
  Files             ?      376           
  Lines             ?    13632           
  Branches          ?     1605           
=========================================
  Hits              ?     9557           
  Misses            ?     3432           
  Partials          ?      643           

Impacted Files	Coverage Δ	Complexity Δ
...e/cloud/tools/eclipse/appengine/libraries/Pom.java	86.90% <94.44%> (ø)	60.00 <5.00> (?)

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