Merge pull request #1 from neoludo/FEATURE_BASIC_AUTH

integrate pull request on BASIC authentication
downgraded Jetty version to 8 instead of 9 that required JVM 7
Add authentication failing test
Merge branch 'basic_authentication'

Conflicts:
	bpm/bonita-api/bonita-client-api-http/pom.xml
	bpm/bonita-api/bonita-client-api-http/src/test/java/org/bonitasoft/engine/api/HTTPServerAPIIT.java
remove unused files
BS-1820, add version in bonita home + add check on it
remove all .orig files
add .orig to git ignore
[ENGINE RELEASE] Created the release 6.2.0.alpha-02
[ENGINE RELEASE] Created the release 6.2.0-SNAPSHOT
BS-2425, read VERSION file in bonita home
BS-2425, change unpack of bonita home to include ALL files
BS-2425, throw nice exception when version file is absent or unreadable
fix bonita exception: cause was lost!
BS-2425, fix bpm service test: add VERSION FILE
[ENGINE RELEASE] Created the release 6.2.0.alpha-02
[ENGINE RELEASE] Created the release 6.2.0-SNAPSHOT
[ENGINE RELEASE] Created the release 6.2.0.alpha-03
[ENGINE RELEASE] Created the release 6.2.0-SNAPSHOT
[ENGINE RELEASE] Created the release 6.2.0.alpha-04