rename eclipse/build-4.2.1.xml -> eclipse/build-4.2.2.xml, webtools/build-3.4.1.xml -> webtools/build-3.4.2.xml; update builders for juno, eclipse, and wtp in prep for Juno SR2 target platform builds
replace site.xml with composite*.xml because apparently tycho now ignores site.xml files when parsing sites for content. Silly tycho.