Initial proof-of-concept SM-DP+ for GSMA consumer eSIM RSP

This commit introduces

* the osmo-smdpp.py program implementing the main procedures and the
  HTTP/REST based ES9+
* python modules for ES8+ and non-volatile RSP Session State storage
* the ASN.1 source files required to parse/encode RSP
* 3GPP test certificates from SGP.26
* an unsigned profile package (UPP) of a SAIP v2.3 TS48 test profile

As I couldn't get the 'Klein' tls support to work, the SM-DP+ code
currently does not support HTTPS/TLS but plan HTTP, so you either have
to modify your LPA to use HTTP instead of HTTPS, or put a TLS proxy in
front.

I have successfully installed an eSIM profile on a test eUICC that
contains certificate/key data within the test CI defined in GSMA SGP.26

Change-Id: I6232847432dc6920cd2bd08c84d7099c29ca1c11

smdpp-data/certs/DPpb/PK_S_SM_DP2pb_ECDSA_BRP.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFowFAYHKoZIzj0CAQYJKyQDAwIIAQEHA0IABHNhhV5ZAmSyUscaYGKgIeJ7Rvdg
+uBOCBqf3RCDvi8Vai5iNFlj51w06LYSAqt9k5ixNcSfeWgorkXqUP0R0qt0=
+-----END PUBLIC KEY-----

smdpp-data/certs/DPpb/PK_S_SM_DP2pb_ECDSA_NIST.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEPi11oQYiEhbCruj61YT3eWM8+URo
+G17HWpZlP19AHEdq451UbAMtMtAHCnuG5dzrqt3zHKXCdmwZa9ebwhoBgA==
+-----END PUBLIC KEY-----

smdpp-data/certs/DPpb/PK_S_SM_DPpb_ECDSA_BRP.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFowFAYHKoZIzj0CAQYJKyQDAwIIAQEHA0IABIkyU+zJTFHfT+5uDbCVHPxlYnSB
+tUGOVXBp9If6oVRmpcuOEMwrOAmc8qkp9/gtrAZRJrcdBkCWHbf5GknpVhI=
+-----END PUBLIC KEY-----

smdpp-data/certs/DPpb/PK_S_SM_DPpb_ECDSA_NIST.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEEwq49At75yXkmGnxnEAdrlwch0J
+VaJkSuBfrkvCMU5dwJ9r8BGAJhZTQuISMYd142XztXMlNzBmuZBuC9E4jQ==
+-----END PUBLIC KEY-----

smdpp-data/certs/DPpb/SK_S_SM_DP2pb_ECDSA_BRP.pem

@@ -0,0 +1,8 @@
+-----BEGIN EC PARAMETERS-----
+BgkrJAMDAggBAQc=
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----
+MHgCAQEEIJyuLhpWB6nVeDgu7pMuJR9SME+G7rHxcIzb08B74s09oAsGCSskAwMC
+CAEBB6FEA0IABHNhhV5ZAmSyUscaYGKgIeJ7RvdguBOCBqf3RCDvi8Vai5iNFlj5
+1w06LYSAqt9k5ixNcSfeWgorkXqUP0R0qt0=
+-----END EC PRIVATE KEY-----

smdpp-data/certs/DPpb/SK_S_SM_DP2pb_ECDSA_NIST.pem

@@ -0,0 +1,8 @@
+-----BEGIN EC PARAMETERS-----
+BggqhkjOPQMBBw==
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIGaTEUljnbqsHcPTBsWL0t/SL3O/Y6yGMZgykLV/kJNFoAoGCCqGSM49
+AwEHoUQDQgAEPi11oQYiEhbCruj61YT3eWM8+URoG17HWpZlP19AHEdq451UbAMt
+MtAHCnuG5dzrqt3zHKXCdmwZa9ebwhoBgA==
+-----END EC PRIVATE KEY-----

smdpp-data/certs/DPpb/SK_S_SM_DPpb_ECDSA_BRP.pem

@@ -0,0 +1,8 @@
+-----BEGIN EC PARAMETERS-----
+BgkrJAMDAggBAQc=
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----
+MHgCAQEEIHX/Mi9BZhba4aSE73HUh0+w3zKV/TXCy6SJ+7K7nHv2oAsGCSskAwMC
+CAEBB6FEA0IABIkyU+zJTFHfT+5uDbCVHPxlYnSBtUGOVXBp9If6oVRmpcuOEMwr
+OAmc8qkp9/gtrAZRJrcdBkCWHbf5GknpVhI=
+-----END EC PRIVATE KEY-----

smdpp-data/certs/DPpb/SK_S_SM_DPpb_ECDSA_NIST.pem

@@ -0,0 +1,8 @@
+-----BEGIN EC PARAMETERS-----
+BggqhkjOPQMBBw==
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEINzWlLd4lX6Omt292UQz6e+Pc9EeSRxI1CWjipSRvTvtoAoGCCqGSM49
+AwEHoUQDQgAEEEwq49At75yXkmGnxnEAdrlwch0JVaJkSuBfrkvCMU5dwJ9r8BGA
+JhZTQuISMYd142XztXMlNzBmuZBuC9E4jQ==
+-----END EC PRIVATE KEY-----