feature/methods optional parameters

[baywet]

• removes parameters hashmap as the insertion is done directly from the body object
• code-gen udpate: methods optional parameters
• udpates unit tests
• codegen update: adds default constructor for body
• codegen: defensive programming
• code-gen update: normalizes delta functions to optional parameters
• udpates unit test for delta requests
• updates types summary
• splits basecollectionrequest for more precise generation
• codegen update: collection requests rationalisation
• updates types summary
• code-gen update: body to parameter set rename
• codegen update: moves delta link and delta token to request from builder
• udpates unit test for the new parameterSet generation
• adds a base delta collection request to parse the deltaLink

fixes #76

This pull request adds support for optional OData method parameters and streamlines the experience between functions and actions.
It also adds sugar methods for delta to parse the delta link and add the token query string parameter to the request.

final Request request = base.graphClient
            .users()
            .delta()
            .buildRequest()
            .deltaLink("https://graph.microsoft.com/v1.0/users/delta?$deltatoken=7ePNoMilh_6jGw8ZCAXfe7DBBYn5cAXbIlHDE9C1NqYBWrAmcZVRZNCeSQrOjsrQboz7DEeiB3ne78Yb6yFn4F49LhMk0eu8SAhfMyDC2yYWXGv1OXt80YGQ-rk-g7xaTcjs9Za6mQ78dwlC4apWq82EcFTjBF5V7rv4R17dMF9b0812qHLWS0aHX92TrmBBI26gLtO-_wAF2rKvltvQ8SNfJpeNyIxYO2t8fnSqaLml-ptZtgvbAPXTsJn9SpI7cDQlrZrWczdGS4yCOMUvpzClHLjb2CuKrxPcG2oD0jinB4IDB4ISC8gzb3Gst8j1cPgWMKC-Q-XVaonjz3hVi4eRVGqLtJefjuSIY8mCQv2tKTaKVfNvVSWvujtfQ6mGzLqeie0jOCI3M-w-U1iMnS3DNx6c-pGT6AmuSDjR_pR8stnqFeWKW_c5Vl8g9dbFefVHfuCelQ0WESf6rkqKReMnFM6WhExFczYCWZ42VnBBs5jEDnQpetkGf1n2x-27QLkwGUge_2cqCec8gU7lP4y43l7zBck5tP9S59TbJVJFtQ_-xw9PqMvFhnOfEciBwMubXXygEjYvltTdwiAwx4Fzaetc96GMG6Qz7SdyoSKqF5FsZvrNMsFcQAd6SjP_423-a-6ssDXeZWGQC0Sr2aLCJrXJPepfft-sTNLuPYL1Y_Pdl2DnCSvusM7tT3ONZNjRxYZhp3sZ56Su_AL0eA1pPcnqTwLpmbp7ifV2vZlG5AcXxTXYpidKjoQ1NRxIMe5ia-73-dszaMlG3wzdE_kqrJISg9UZ42W_5BdLpHNKS-dV4r2SOFzkm0qYlxWI4_p5P200C3dgP4JhODelQdEwFv-tM2NsxuDZ4EFtw2hexvRdkaVGvngqN21e32ZkAgh-aOS0uTDSRD6bE_TgIRoS53h8-Eps59wevGmgHNJUafsNICKU3XUYg0NAxohZ7t7lAsmM8Uu4L2Ex0MshI_SOVRp7Taj37NLWoaV-PYqgZIp9RNDagMYKZI4G4g2dPUIWsLq2g9dBwQNSQC2rX95hQeJAmsuQXJosmgWBn9a5JebhE_hBBiSU2YGAdNFpdBctBzwVfLJJnsNxpVYGAdc0aOa5o75WjM3fHozkMgmjVz7zz8GJLrBgEV7ArkCQNq2QZVMvZH81tLXsU6BtaBDCYH0_HdMjFArn4L3F6fapzv96DsK-ITKTIv5yra0s_u58XlLdGABKMcc5rXTAieH5W9Vio0jk1rohlXl1xwh42fWZBFAtFjEcFJ3XMke1nEqwro0BjmS6ERLJN395Wcsp7QVPisxI4VIx3wIBtdURZv7UDeRa9migUJPRjUgX4T2sHteOCPGWu_eIX6_9rlW0Lj2kfny-CMrn7f4S_jUgVeNdpMiknbRGIw2_8qUud93DEpaOs11vjLJnpCA5OYteyVt5hK5Pjy008R-tgvkYkrmUSwDWh58pWztAw2pK6bONIstjo1jc5hA9p8rcH4RPIbnMFJ2zmG8VbpsnQquPQquIIo0YLAzIeBgGiMwHjiaXPSKI_Ezuc3WsIYKlQkQHUFjI5YQUY9vBDTWzs0sHA3h_Z0jQbOGcekfeiRdFdvg_TjzTneHQG-oK1jqeCESQpb6-Oi-fJasDdjDSbmh_encE1o1OLJpiW3bCgawpgjhsI65Ygmf6CUhLNaIOaQmTtaUloF3xMk4gqtgFDNwPhuWl46U83N4sBlULJRgnuL9Douh6djW777BiU20ADrWdAO8QM0lluE3dD1LcyatAo2V6bfwozkGheYoABaoN-rlg9X2ovc5WluS56FtOs06rY1dUf8mV_qadzIgHdyYTE6qmQfnNHMVgZRxSQc4IRZwaXgT1GFq_A3Gr3bIVLbWkoNpwoITLekG6c6ISVaLNQNQD_-2mfHsvXRNJEJIIShqOL9HhJEARkK7U1yjvvlqjd05oIC65ylX2k6-jfITwAGttDBD177LMYDTJ-65ag4tPMUeZy0nUG9RePqfHs9NxSZmZf4cYct6CgsMEfi8ctUJuKhaA4MhLSKVBYTNkcy8bHAkuA7ROTopSqceWPOBuec1Ze7vp9FOQK6o0zKkgtk4rB6hBTAyGzBZybkqGisczxd-nMBYn8coqa-IiEeGWo85zfXolJBd4TLpjQWbZhUzfHlpAS64mGPDA6knY4B_cU1sLsMyxFU2m7RtlAomO5-B4ciOIebGDJIj5vg_p-6XShs6t3fERo-C43RDVG2dj-kB3Y4TxMhIRrXErdHXzI8d7Z1M6XAObh2JONHr2X48E9GRgexQEg0gRJKcPBeJaM38lt5oKIa9Pfi75ZApZlOUp6bmiJwIDORJ5eTaHzO-50pnZbzyt9uj8DAZnasj3nfrt1jzDWGmmdRqL2wNyWiiwxNWePivtJdCwr86L-qvHyqbQQjRgGpjI3xHAoAvLL717O2V6CDRIf_DGdt0Dct8DUtK9jnIaYSYukDes1FJeDj-KfF-lMdrm1K2EeTlB1pUdG_NaX1bknCmjkXy6lVgP3m3I_d7yNUVVpVsXz9kIbo-voEugmd8uo3tlx2etk_3oNU0WqGPI3xODpp_ENlpwnji1C_UO5eVGo8et9o2j482HpaEb1q-Alql0KlpgnNTb8tqGHLM3H3nf7zPJJ9Rd80tYJIBWQnzaCtLMCsvzqmTwjnOY8F0EQk6ZwLDJsee5xWeCVfpZ6ZzZH5ytcEsUWynoNM4fQvUbtt6yUu11y3AcZMP3vxfmwxou-o6tQXS_u_2W0OVjqgBk4r3FvhE0pmwNDEALIM1vbQoOASIwXBNKkvGL95AVaZZ8gxO9mX13R4KtV2PXt3QzVJOhYe0duB6gTr_Ng45doE6yNWn2tJlws3eywIhmLCh3dAqCHZghsZPltwRoqwY0Ib_JCuAnZsDA-scaRiL7ptFtIOXb1O1cT5ZRnM72lBxfkdEGKuDtv-TPo3okmqigtn4hckzaXeZlC42Ax2U2me5XqBj_Vkc9pSAwUN64-lm5cm_qrVwxy6pERuIGVP6xEh9HMBzDQgemJcurwfmKqZs.f1VLaUpVA-BopcJiSi_pLEUVB2GRt83Cbrw6x2n0Hy8")
            .withHttpMethod(HttpMethod.GET)
            .getHttpRequest();
        assertNotNull(request.url().queryParameter("$deltatoken"));

Notice the additional "deltaLink" method that accepts the full link and extracts the token from it.

final Request request = base.graphClient
            .reports()
            .getMailboxUsageStorage(ReportRootGetMailboxUsageStorageParameterSet.newBuilder().withPeriod("somePeriod").build())
            .buildRequest()
            .withHttpMethod(HttpMethod.GET)
            .getHttpRequest();
        assertEquals("https://graph.microsoft.com/v1.0/reports/microsoft.graph.getMailboxUsageStorage(period='somePeriod')", request.url().toString());

Notice the ParameterSet builder that provides a fluent API for consummers to add the parameters to the OData function they want to add instead of having methods with all the parameters for getMailboxUsageStorage

testBase.graphClient
.me()
.sendMail(UserSendMailParameterSet.newBuilder().withMessage(message).withSaveToSentItems(true).build())
.buildRequest()
.post();

Notice the parameter set builder that provides a fluent API for the OData action parameters, with a identic experience as for functions.