Revert "Provides jolicloud-webapps-engine"

This reverts commit 72ce6b5e1876bde2cc885abb037188772bf45fa4.

Conflicts:

	debian/postinst

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   debian/control
#	deleted:    debian/postinst
#	modified:   debian/prerm
#
