Updated tests to use testthat library
Use rhoptions()$HADOOP.TMP.FOLDER rather than /tmp
Referred to a function that didn't exist, now calls rhoptions()$server$rhjoin()
Changed HADOOP.TMP.DIR to look for environment variable RHIPE_HADOOP_TMP_FOLDER instead of always using /tmp
Comments
jf
jfj
Merge branch 'rearch' of https://github.com/saptarshiguha/RHIPE into rearch

Conflicts:
	src/test/R/test-simple-mr.R