parser does not expect a metadata expression in the interval expression in WCPS

[Bang Pham Huu]

From Piero's comment in ticket:595#5 and Dimitar's request.

An other use case is, this time for the imageCrsDomain, is when we need to scale dimensions of a coverage by the domain of different coverages, like in the following case I want to scale d on spatial-only dimensions of c:

for c in (eobstest_1),
    d in (eobstest_2)
return encode(
  scale(d[Long(43:44), Lat(24:24.5)],
    {    t:"CRS:1"( imageCrsDomain(d[Long(43:44), Lat(24:24.5)], t   )),
      Long:"CRS:1"( imageCrsDomain(c[Long(43:44), Lat(24:24.5)], Long)),
       Lat:"CRS:1"( imageCrsDomain(c[Long(43:44), Lat(24:24.5)], Lat )) }),
"csv")

This is not possible yet, the parser does not expect a metadata expression in the interval expression, and complains about not finding a COLON indeed.