Fix errorprone warnings from compiler

[MoonBow-1]

Description

There are 39 warnings about error-prone code, mostly NonApiType ArrayLists and missing locale declarations.

• [x] Fix ArrayLists
• [x] Fix StringCaseLocaleUsage
• [x] Fix inconsistent capitalization
• [x] Fix ZonedDateTime.now() default timezone
• [x] Fix Default charset
• [ ] Fix HidingField in CFE01GenerateFile (extends RelpGenerateFile)
• [ ] Find out what to do with MHC exclusion in HubDirList

[MoonBow-1]

Inconsistent capitalization found in:

• HostIPPayload
• HostInterfacePayload

Before:

public HostInterfacePayload(final String interfaceType, final int hostMetaID) {
    this.interfaceType = interfaceType;
    hostMetaId = hostMetaID;
}

public HostIPPayload(final String ipAddress, final int hostMetaID) {
    this.ipAddress = ipAddress;
    hostMetaId = hostMetaID;
}

After:

public HostInterfacePayload(final String interfaceType, final int hostMetaId) {
    this.interfaceType = interfaceType;
    this.hostMetaId = hostMetaId;
}

public HostIPPayload(final String ipAddress, final int hostMetaId) {
    this.ipAddress = ipAddress;
    this.hostMetaId = hostMetaId;
}

[MoonBow-1]

StringCaseLocaleUsage fix:

Before:

.toLowerCase()

After:

.toLowerCase(Locale.forLanguageTag("fi"))

Uses IETF language tags

[MoonBow-1]

NonApiType warnings fixed:

Before:

ArrayList<x> list = new ArrayList<>();

After:

List<x> list = new ArrayList<>();

[MoonBow-1]

DefaultCharset warnings fixed:

Before:

string.getBytes();

After:

string.getBytes(StandardCharsets.UTF_8);

[MoonBow-1]

ZonedDateTime warning fixed:

Before:

return ZonedDateTime
    .now()
    .format(DateTimeFormatter.ISO_INSTANT);

After:

return ZonedDateTime
    .now(ZoneId.systemDefault())
    .format(DateTimeFormatter.ISO_INSTANT);