Add save document operation (WIP)
Add finding collection config by name
Build search handler URL for search requests
Add async timeout for CompletableFutures
Fix Spring config for DocumentService
Hardcoded default port for embedded ZK
Separated available operations in REPL

Based on existence of the collection, different sets of operations are
available.
Skip leaderless collections when fetching config

Cluster will eventually converge and when it happens, curator will
rerun the whole sync process all over
Fix construction of update handler endpoint
Hack around incorrect content type of updates

Solr returns ‘text/plan’ content type for update responses, even if
explicitly requested for ‘application/json’ (via ‘wt’ query param or
‘accept’ HTTP header). It causes problems with  deserialisation, so
we’re fetching response payload as a String and deserialise it using
Gson.
Merge pull request #5 from mzasada/issue/2

Issue/2