Find Usages: Change .text extension to .txt in test data
Change Signature: Drop JetGeneratedInfo class (unused so far)
Change Signature: Translate JetValVar to Kotlin
Change Signature: Rename JetUsagesViewDescriptor.java to .kt to keep history
Change Signature: Translate JetUsagesViewDescriptor to Kotlin
Minor: Replace deprecated function
Change Signature: Rename JetMethodDescriptor.java, JetChangeSignature.java to .kt to keep history
Change Signature: Translate JetMethodDescriptor.java,
JetChangeSignatureData.java to Kotlin
Change Signature: Rename JetParameterInfo.java to .kt to keep history
Change Signature: Translate JetParameterInfo to Kotlin
Change Signature: Rename JetChangeInfo.java to .kt to keep history
Change Signature: Translate JetChangeInfo to Kotlin
Change Signature: Retain formatting of existing parameters when parameter count/order changes
 #KT-6412 Fixed
Change Signature: Remove useless indentation