Constants that are defined twice in ruby due to capitalization

[nwoetzel]

There are some constants in SMARTSParserConstants that are defined in lower and upper case (with different values) that are capitalized in the lib, so that an error is emitted.
http://cdk.github.io/cdk/1.5/docs/api/org/openscience/cdk/smiles/smarts/parser/SMARTSParserConstants.html
This is the error:

lib/rcdk/java.rb:37: warning: already initialized constant Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::C
lib/rcdk/java.rb:37: warning: previous definition of C was here
lib/rcdk/java.rb:37: warning: already initialized constant Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::N
lib/rcdk/java.rb:37: warning: previous definition of N was here
lib/rcdk/java.rb:37: warning: already initialized constant Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::O
lib/rcdk/java.rb:37: warning: previous definition of O was here
...
Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::P
...
Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::S
...
Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::A
...
Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::H
...
Rjb::Org_openscience_cdk_smiles_smarts_parser_SMARTSParser::V