Update config to use new Elasticsearch server

[nrejac]

See the following code that references a hard-coded value, 'c18node2.acis.ufl.edu':

idigbio-search-api/src/config.js

Line 31 in 2b93866

server: "http://c18node2.acis.ufl.edu:9200",

[wilsotc]

That value isn't used even in testing.
config.search.index is but not config.search.server

[nrejac]

Great, definitely should be removed to avoid being misleading.

Here is another line that should be modified, after copying into 'info', info.server is deleted:

idigbio-search-api/src/controllers/home.js

Line 56 in 124a086

delete info.server;