fix memory leaks
Merge remote-tracking branch 'origin/4.5.0' into 4.5.0

Conflicts:
	httpclient/src/main/java/ucar/httpclient/HTTPMethod.java
remove stacktrace
fix GribCollceiton.getCalendarDateRange()
fix tomcat download
Merge remote-tracking branch 'origin/4.5.0' into 4.5.0
PartitionManagerFromIndexList - dont instantiate the partition File;
GribCollectionBuilder.makeIndex() - use filename, not File
Enable Sigmet IOSP.
Add basic unit test for sigmet IOSP.
Improve isValidFile() for Sigmet IOSP.

Make the check more robust by checking for proper type Ids on multiple
data structures.
Fix problem reading NIDS Storm Track (TDS-506)

For the nested packets, the file pointer wasn't being advanced past
the first one's data. Also improve the error message to indicate a
problem with the packet code, not the product code.
change MIXED_INTERVALS capitalization back to 4.3
fix radar server;
GC: allow direcrory scanning to fail.
Merge remote-tracking branch 'origin/4.5.0' into 4.5.0
grib2 interval filtering
grib2 interval filtering
grib2 interval filtering
added Coverity-Scan files to .gitignore
test git checkin
grib  indexing to tolerate missing directory, io errrors.