[maven-release-plugin] prepare release drill-1.0.0-m1
[maven-release-plugin] prepare for next development iteration
Fix bufferl snapshot version so it depends on correct netty upstream
DRILL-234: Prefix drill artifacts with "drill-" to avoid ambiguity in jar names.
DRILL-233: Move protobuf IDLs to a separate module and check in the compile Java sources
DRILL-240: Add apache-rat-plugin to Eclipse' plugin Execution ignore list
DRILL-228 maven submodule build fails at license-maven-plugin
Correct protocol root pom reference due to merge conflict
test from SP
fix batch initialization
improve hash exchange test coverage
DRILL-242: fix negative hash values, sort order POP case and sending of empty batches with no schema
add schema schema to partition sender root exec.
extra debug output for parquet test.
for HashPartitionSender, set the receiving minor fragment id correctly
allow empty writable batches and start updating operators to permit getting record counts when they're known to be 0.  also modified aggbatch and sortbatch to handle empty batches.
fix merge conflict