headersclean: Fix compiler warnings

This change is not complete. There are plenty more warnings.

qcontactid.h:115:61: error: extra ‘;’ [-pedantic]
qcontactfilter.h:123:58: error: extra ‘;’ [-pedantic]
qcontactfetchhint.h:100:68: error: extra ‘;’ [-pedantic]
qcontactdetail.h:153:20: error: declaration of ‘contexts’ shadows a member of 'this' [-Werror=shadow]
qcontactactionfactory.h:66:48: error: declaration of ‘parent’ shadows a member of 'this' [-Werror=shadow]
qcontactmanager.h:72:5: error: "Q_QDOC" is not defined [-Werror=undef]

Change-Id: I0a6fc98cbedbabfddcc1971d9e51fca42ac61f30
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>