Replace ByteArrayInputStream and ByteArrayOutputStream usage with something more efficient

[punktilious]

Issues with ByteArrayOutputStream:

1. Access to the underlying byte[] copies the array which can increase memory pressure in some high throughput scenarios where large buffers are involved;
2. Many methods are synchronized.

Issues with ByteArrayInputStream:

1. Many methods are synchronized.

Implement a new class which can provide InputStream and OutputStream accessors, using a single byte[] which can be resized if needed, or avoid array copies if an ideal size is given to begin with.

Replace ByteArrayOutputStream and ByteArrayInputStream where they are used to compress/decompress resource payloads.

[lmsurpre]

I ran an export after getting this change deployed and the performance looks good to me:

INFO bulkexportfastjob[164] processed 138753 resources in 21.34 seconds (rate=6501.5 resources/second)
INFO bulkexportfastjob[164]                          Patient      32618
INFO bulkexportfastjob[164]                        Condition     360376
INFO bulkexportfastjob[164]                      Observation    6359819
INFO bulkexportfastjob[164] -------------------------------- ----------
INFO bulkexportfastjob[164]                            TOTAL    6752813

Prior to this change, I'd seen export times over 10,000 resources/second, but back then we were also leaking memory (due to #2040 ).

Lets call this one 'good' and we can revisit in the future as part of a broader performance analysis.