sonar Major issues

sonar Major issues

Replace these toUpperCase()/toLowerCase() and equals() calls with a single equalsIgnoreCase() call
Sonar Link:
https://sonar.onap.org/component_issues?id=org.onap.dcaegen2.platform%3Ainventory-api#resolved=false|severities=MAJOR|assignees=Snigdha503415
Location:
src/main/java/io/swagger/api/impl/DcaeServiceTypesApiServiceImpl.java
Line No:162

Change-Id: I2d3514753229c9c7a3c9fc005d26d55451f90603
Issue-ID: DCAEGEN2-303
Signed-off-by: Snigdha Sucharita Patra <sp00503415@techmahindra.com>