* Add oraclejdk9 to .travis.yml

* Upgrade maven-compiler-plugin

* Exclude jdk.tools from hadoop dependency

[core] Fixing squid:S1319 -  Declarations should use Java collection interfaces such as "List" rather than specific implementation classes such as "LinkedList".
(manolama - updated bindings added since the PR)

Signed-off-by: Chris Larsen <clarsen@yahoo-inc.com>

* Expand on the README, covering table creation and best-practices for table config
* Avoid unnecessary Text object creations (in loops and instead of byte[] usage)
* Use a ConcurrentHashMap to better match the DB API
* Fix error messages and always call printStackTrace() on exceptions
* Use BATCHED_OK instead of OK in insert() (more correct)

* in couchbase2 work around ReactiveX/RxJava#3824
* accumulo test hangs, so skip tests
* hbase10 and asynchbase test crashes with unknown class version, so skip tests
* orientdb tests fail, so skip
* core jar-with-deps fails, so keep them broken out

fixes #704, fixes #705

The Accumulo tests don't properly initialize their mini cluster on windows,
so skip the tests entirely in that environment.

closes #617

The Accumulo tests don't properly initialize their mini cluster on windows,
so skip the tests entirely in that environment.

closes #617

- define checkstyle configs in as few places as possible
- use checkstyle:check since it has defaults that match what we want (fail after logging to console)
- modules that have current failures set property checkstyle.failOnViolation to false.

closes #340

[core accumulo couchbase memcached] Fixing squid:S1155 - Collection.isEmpty() should be used to test for emptiness

Replaces numeric status codes with a canonical set of Status objects,
each with a short name and description.
Bindings with more specific errors (e.g., timeouts) return additional
statuses.

This changes the default output from messages like:

   [UPDATE], Return=0, 511

To:

   [UPDATE], Return=OK, 511

Again, a lot of whitespace changes and the normal checkstyle type errors.

2 items of note:

1. Deprecated QueueElement since it is not used.
2. Moved some of the exception handling to common locations to remove
   empty catch blocks.

As a part of branching to stage 0.2.0 release in #266, set version
for continued development on master branch.

* remove unused declared deps in a few places
* lex sort modules in top level pom
* update maven plugin versions.
* no more jar-with-dependencies
* set ycsb-core to provided in bindings
* introduce a bindings-parent pom that sets
** stage dependency copy on building binding
** iff binding has a README.md, build a binding-specific dist artifact
* update distribution assembly to
** properly build after modules
** use per-binding sets of dependencies

closes #250

* Need a SNAPSHOT version because non-SNAPSHOT is reserved for actual releases.
* Increment minor version per pre-1.0 guidelines from the Version Numbers guide

Fixes #236.

* Increment Accumulo Version to 1.6.0
* Fix accumulo dependency versions
  - Harmonize guava version for Accumulo.
  - Automatically manage slf4j version.
* Clean up depr. code
* Clean up return codes and error logging

Make the batchwriter's number of threads configurable.

clean up dead code in client.

* set .gitignore to standard eclipse
* update versions of Accumulo to 1.4.4
* Pin slf4j binding to 1.5.8

Accumulo, Thrift, and YCSB all use different versions of slf4j, causing
runtime issues because everything is bundled together. Pin the version
to something in the middle that seems to work, even if it's not the
latest and greatest version.

Based on YCSB++

http://www.pdl.cmu.edu/ycsb++/