Added comments, refactoring, improved testing

TapSchemaManager/pom.xml

.../inaf/oats/ia2/tapschemamanager/businesslayer/Column.java

...schemamanager/businesslayer/CredentialsConfiguration.java

...mamanager/businesslayer/CredentialsConfigurationBean.java

...ats/ia2/tapschemamanager/businesslayer/EntityWrapper.java

...apschemamanager/businesslayer/EntityWrapperContainer.java

...af/oats/ia2/tapschemamanager/businesslayer/ParsedUCD.java

.../inaf/oats/ia2/tapschemamanager/businesslayer/Schema.java

...af/oats/ia2/tapschemamanager/businesslayer/SearchUCD.java

...2/tapschemamanager/businesslayer/SeparateCredentials.java

.../inaf/oats/ia2/tapschemamanager/businesslayer/Status.java

...t/inaf/oats/ia2/tapschemamanager/businesslayer/Table.java

...af/oats/ia2/tapschemamanager/businesslayer/TapSchema.java

...inaf/oats/ia2/tapschemamanager/businesslayer/UCDInfo.java

...2/tapschemamanager/businesslayer/UCDServiceException.java

...it/inaf/oats/ia2/tapschemamanager/businesslayer/Util.java

...naf/oats/ia2/tapschemamanager/webapp/CredentialsBean.java

...tapschemamanager/webapp/CredentialsConfigurationBean.java

.../tapschemamanager/webapp/CustomPartialResponseWriter.java

...schemamanager/webapp/CustomPartialViewContextFactory.java