remove travis-ci logs from IRC

unfortunately they are kind of distracting
Merge pull request #1169 from crate/m/travis_irc

remove travis-ci logs from IRC
throw better error message if setting value is of invalid type
change type of information_schema.table_constraints.constraint_name

to array of string
Merge pull request #1176 from crate/m/array_constraint_name

change type of information_schema.table_constraints.constraint_name
add a note that some requests might fail during graceful-stop procedure
update crash to 0.10.1
remove day_joined columns from partition import file
add section about watching the graceful-stop process
add a note about the admin-ui

might turning red when a node shuts down
Merge pull request #1177 from crate/m/request_fail_note

M/request fail note
updated CHANGES according to 0.43.1 release
update es/upstream

to fix test errors due to missing SearchService binding in blob tests
and fix errors on fast and parallel starting and stopping of Nodes
remove quickcheck from the testdependencies

it spilled a warning about not being build for java 7
added tests for crate signal handling
fix tracking of active sql requests
upgrade crate-python used for tests to 0.12.0

in order to use the improved CrateLayer
Merge pull request #1178 from crate/m/process_tests

M/process tests
renamed NullType to UndefinedType in order to avoid confusion
Merge pull request #1181 from crate/h/rename-nulltype

renamed NullType to UndefinedType in order to avoid confusion