Repository navigation

Fix NPE in addRoot/removeRoot when roots listChanged is unset #827

Job	Run time
Server Conformance	1m 25s
Client Conformance (tools_call)	1m 0s
Client Conformance (sse-retry)	1m 22s
Auth Conformance (auth/metadata-var2)	1m 0s
Client Conformance (initialize)	1m 41s
Auth Conformance (auth/metadata-var1)	57s
Auth Conformance (auth/scope-step-up)	1m 10s
Auth Conformance (auth/metadata-default)	1m 8s
Auth Conformance (auth/scope-from-www-authenticate)	1m 3s
Client Conformance (elicitation-sep1034-client-defaults)	2m 24s
Auth Conformance (auth/basic-cimd)	54s
Auth Conformance (auth/scope-omitted-when-undefined)	56s
Auth Conformance (auth/metadata-var3)	1m 0s
Auth Conformance (auth/token-endpoint-auth-post)	1m 6s
Auth Conformance (auth/pre-registration)	42s
Auth Conformance (auth/token-endpoint-auth-basic)	56s
Auth Conformance (auth/scope-retry-limit)	52s
Auth Conformance (auth/scope-from-scopes-supported)	49s
Auth Conformance (auth/token-endpoint-auth-none)	1m 3s
	21m 28s