SolrUtils: reliable regression test suite

* Makes test suite independent from PDF extraction process.
  (closes #1590)

* Simplifies test suite

Signed-off-by: Patrick Glauner <patrick.oliver.glauner@cern.ch>
1: D200 One-line docstring should not occupy 3 lines
4: I102 copyright year is outdated, expected 2014 but got 2011
28:29: E126 continuation line over-indented for hanging indent
43:56: E261 at least two spaces before inline comment
46: D103 Docstring missing
75: D103 Docstring missing
102: D401 First line should be imperative: 'Add', not 'Adds'
102: D205 Blank line missing between one-line summary and description
109:21: E221 multiple spaces before operator
110:19: E221 multiple spaces before operator
111:20: E221 multiple spaces before operator
112:18: E221 multiple spaces before operator
114:27: E221 multiple spaces before operator
115:25: E221 multiple spaces before operator
117:25: E221 multiple spaces before operator
120:79: E231 missing whitespace after ','
125: D200 One-line docstring should not occupy 3 lines
140: D103 Docstring missing
144: D401 First line should be imperative: 'Return', not 'Returns'
144: D205 Blank line missing between one-line summary and description
144: D208 Docstring is over-indented
156:34: E231 missing whitespace after ','
158:31: E231 missing whitespace after ','
168:21: E261 at least two spaces before inline comment
168: D401 First line should be imperative: 'Run', not 'Runs'
168: D200 One-line docstring should not occupy 3 lines