Fix marking of two unstable tests to really prevent them from running
ISPN-4204: Sync distexec demo project with current test code

Add a no argument constructor to WordCountCollator
Add a new distributed executor that performs a regular expression search
of the values in the cache
Reset counters in constructor for WordCountMapperEmitPerValue, and only
log progress after processing 5000 values
ISPN-4216 Use IGNORE_RETURN_VALUES flag for inserting keys/values in M/R intermediate cache
ISPN-3689: Preloading fails with JdbcBinaryCacheStore on DB2 (master)
ISPN-4214 Custom cache store and cache loader sets SHARED attribute to the value of NAME attribute
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