[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>

Changed int to long in Measurements code to support large scale workloads.
(manolama - fixed checkstyle errors)

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

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

be used to replace the strings.

to the workload client threads. Had to use setters to get around the
checkstyle complaint of having too many parameters.

for each of the children. This lets us re-use byte iterators if we need to
access the values again (when applicable).

* 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

* Optimise fillBytesImpl so it doesn't trigger an Exception on every byte[] generated.

* Make the verbose output of BasicDB thread safe.

* Optimise the verbose output of BasicDB when using multiple threads

Solve issue with hdrhistogram+raw which had combined hdrhistogram with histogram

collector. This will allow greater insight into the generations.
Now the client will emmit the stats for each collector at the end of
run along with the totals.

the JVM spent in GC. It now prints the time and percent of time in
the final output.
Also fix cases where the garbage collector implementation returns
-1 if the count or time isn't implemented.

when the status thread is enabled. This tracks the GC count, thread count,
memory used and average system load (if implemented) over time as well as
the max and min for each measurement at the end.
Also, every run will now measure the total number of garbage collections
from all pools.

This will be used for #653 for databases that require keys or other values to use a limited character set. This generator will create a sequence of strings using a defined list of UTF code points from which to pull.

Fixed nits suggested by @busbey

Eventually it would be nice to move this out into a proper generator with enums to
save space, but as users may have extended CoreWorkload and could be using the
"operationchooser" field, we'll just break it out into a static function so as to
avoid breaking anyone's code.