removed other duplicated code in the inferrer

Change-Id: Ib65ab6ad4b45c3114a9d3f1d169a4bccea273509
removed useless ant files in releng project

Change-Id: Ifafad21a44d15adb2598b688c1db99cab099162f
exclude some other files from analysis

Change-Id: I2e20923a7ecd4bc777f41852028da06e23a93113
coverage for UniqueNames

Change-Id: I9f3974e1a7b10c839fbd1520107794b20ca196db
removed XsemanticsGeneratorConstants

put the constants in generator extensions

Change-Id: Ice5bc9ebfca2b0db4f172387d8e5910c021ef83e
updated to Xtext 2.7.2

Change-Id: I77148db25d48e6abdec877d330ece2aa3c7e0b99