remove spring boot admin from initializr #1239

Job	Run time
build	7m 5s
cancel-previous-runs	3s
publish	1m 38s
latest-versions-cas	34s
supported-versions-cas-mgmt	47s
supported-versions-cas	48s
Validate CAS Mgmt 6.6.3	3m 5s
Validate Discovery Server 6.5.9.2	3s
Validate Discovery Server 6.6.10	3m 8s
Validate Discovery Server 7.0.0-SNAPSHOT	3m 14s
Validate CAS Server 6.5.9.2	2s
Validate CAS Server 6.6.10	23m 47s
Validate CAS Server 7.0.0-SNAPSHOT	36m 2s
Validate Config Server 6.5.9.2	2s
Validate Config Server 6.6.10	3m 19s
Validate Config Server 7.0.0-SNAPSHOT	2m 41s
Sync CAS Mgmt Server 6.6.3 Branch 6.6	11s
Sync Config Server 6.5.9.2 Branch 6.5	2s
Sync Config Server 6.6.10 Branch 6.6	10s
Sync Config Server 7.0.0-SNAPSHOT Branch master	8s
complete	1s
Sync CAS Server 6.5.9.2 Branch 6.5	1s
Sync CAS Server 6.6.10 Branch 6.6	9s
Sync CAS Server 7.0.0-SNAPSHOT Branch master	9s
	1h 27m 9s

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