UoM code for pure numbers

[Piero Campalani]

Unit of measure for pure numbers should be 10^0 and not 10⁰ as is now. See ​http://unitsofmeasure.org/ucum.html#para-29

Both global_constants.sql script and WCS systemtest oracles should be updated then.

$ grep 10⁰ . -r | uniq
./oracle/16-get_coverage_rangeSubsetting2.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/10-get_coverage_scale2.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/18-get_coverage_0D.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/17-get_coverage_rangeSubsetting3.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/02-describe_coverage.kvp.oracle:            <swe:uom code="10⁰"/>
./oracle/07-get_coverage_slice2.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/06-get_coverage_slice.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/26-get_coverage_slice_h_multipoint.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/25-get_coverage_slice_long_multipoint.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/09-get_coverage_scale1.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/12-get_coverage_scale4.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/23-get_coverage_subset_all_dims_multipoint.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/24-get_coverage_slice_lat_multipoint.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/19-get_coverage_trim_irregular_axis.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/11-get_coverage_scale3.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/15-get_coverage_rangeSubsetting1.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/03-get_coverage.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/20-get_coverage_slice_irregular_axis.kvp.oracle:        <swe:uom code="10⁰"/>
./oracle/05-get_coverage_subset.kvp.oracle:        <swe:uom code="10⁰"/>

[Piero Campalani]

Patch applied: changeset:1b9e2eb.